Add Sendgrid integration (incoming email handling)

37 files changed, 380 insertions, 89 deletions

diff --git a/README.markdown b/README.markdown
index e2f137ca..6a3136d0 100644
--- a/README.markdown
+++ b/README.markdown
@@ -84,6 +84,7 @@ Documentation
 - [Task links](docs/task-links.markdown)
 - [Transitions](docs/transitions.markdown)
 - [Time tracking](docs/time-tracking.markdown)
+- [Create tasks by email](docs/create-tasks-by-email.markdown)
 
 #### Working with users
 
@@ -108,6 +109,7 @@ Documentation
 - [Gitlab webhooks](docs/gitlab-webhooks.markdown)
 - [Hipchat](docs/hipchat.markdown)
 - [Mailgun](docs/mailgun.markdown)
+- [Sendgrid](docs/sendgrid.markdown)
 - [Slack](docs/slack.markdown)
 - [Postmark](docs/postmark.markdown)
 
diff --git a/app/Controller/Webhook.php b/app/Controller/Webhook.php
index 06bfcd4e..667c5087 100644
--- a/app/Controller/Webhook.php
+++ b/app/Controller/Webhook.php
@@ -128,4 +128,18 @@ class Webhook extends Base
 
         echo $this->mailgunWebhook->parsePayload($_POST) ? 'PARSED' : 'IGNORED';
     }
+
+    /**
+     * Handle Sendgrid webhooks
+     *
+     * @access public
+     */
+    public function sendgrid()
+    {
+        if ($this->config->get('webhook_token') !== $this->request->getStringParam('token')) {
+            $this->response->text('Not Authorized', 401);
+        }
+
+        echo $this->sendgridWebhook->parsePayload($_POST) ? 'PARSED' : 'IGNORED';
+    }
 }
diff --git a/app/Core/Tool.php b/app/Core/Tool.php
index ade99cad..84e42ba8 100644
--- a/app/Core/Tool.php
+++ b/app/Core/Tool.php
@@ -31,4 +31,24 @@ class Tool
             fclose($fp);
         }
     }
+
+    /**
+     * Get the mailbox hash from an email address
+     *
+     * @static
+     * @access public
+     * @param  string  $email
+     * @return string
+     */
+    public static function getMailboxHash($email)
+    {
+        if (! strpos($email, '@') || ! strpos($email, '+')) {
+            return '';
+        }
+
+        list($local_part,) = explode('@', $email);
+        list(,$identifier) = explode('+', $local_part);
+
+        return $identifier;
+    }
 }
diff --git a/app/Integration/MailgunWebhook.php b/app/Integration/MailgunWebhook.php
index 17338faa..8e542513 100644
--- a/app/Integration/MailgunWebhook.php
+++ b/app/Integration/MailgunWebhook.php
@@ -3,6 +3,7 @@
 namespace Integration;
 
 use HTML_To_Markdown;
+use Core\Tool;
 
 /**
  * Mailgun Webhook
@@ -21,7 +22,7 @@ class MailgunWebhook extends Base
      */
     public function parsePayload(array $payload)
     {
-        if (empty($payload['sender']) || empty($payload['subject']) || empty($payload['recipient']) || empty($payload['stripped-text'])) {
+        if (empty($payload['sender']) || empty($payload['subject']) || empty($payload['recipient'])) {
             return false;
         }
 
@@ -34,7 +35,7 @@ class MailgunWebhook extends Base
         }
 
         // The project must have a short name
-        $project = $this->project->getByIdentifier($this->getMailboxHash($payload['recipient']));
+        $project = $this->project->getByIdentifier(Tool::getMailboxHash($payload['recipient']));
 
         if (empty($project)) {
             $this->container['logger']->debug('MailgunWebhook: ignored => project not found');
@@ -48,12 +49,15 @@ class MailgunWebhook extends Base
         }
 
         // Get the Markdown contents
-        if (empty($payload['stripped-html'])) {
+        if (! empty($payload['stripped-html'])) {
+            $markdown = new HTML_To_Markdown($payload['stripped-html'], array('strip_tags' => true));
+            $description = $markdown->output();
+        }
+        else if (! empty($payload['stripped-text'])) {
             $description = $payload['stripped-text'];
         }
         else {
-            $markdown = new HTML_To_Markdown($payload['stripped-html'], array('strip_tags' => true));
-            $description = $markdown->output();
+            $description = '';
         }
 
         // Finally, we create the task
@@ -64,19 +68,4 @@ class MailgunWebhook extends Base
             'creator_id' => $user['id'],
         ));
     }
-
-    /**
-     * Get the project identifier
-     *
-     * @access public
-     * @param  string  $email
-     * @return string
-     */
-    public function getMailboxHash($email)
-    {
-        list($local_part,) = explode('@', $email);
-        list(,$identifier) = explode('+', $local_part);
-
-        return $identifier;
-    }
 }
diff --git a/app/Integration/PostmarkWebhook.php b/app/Integration/PostmarkWebhook.php
index 6387ba20..642955df 100644
--- a/app/Integration/PostmarkWebhook.php
+++ b/app/Integration/PostmarkWebhook.php
@@ -21,7 +21,7 @@ class PostmarkWebhook extends Base
      */
     public function parsePayload(array $payload)
     {
-        if (empty($payload['From']) || empty($payload['Subject']) || empty($payload['MailboxHash']) || empty($payload['TextBody'])) {
+        if (empty($payload['From']) || empty($payload['Subject']) || empty($payload['MailboxHash'])) {
             return false;
         }
 
@@ -48,12 +48,15 @@ class PostmarkWebhook extends Base
         }
 
         // Get the Markdown contents
-        if (empty($payload['HtmlBody'])) {
+        if (! empty($payload['HtmlBody'])) {
+            $markdown = new HTML_To_Markdown($payload['HtmlBody'], array('strip_tags' => true));
+            $description = $markdown->output();
+        }
+        else if (! empty($payload['TextBody'])) {
             $description = $payload['TextBody'];
         }
         else {
-            $markdown = new HTML_To_Markdown($payload['HtmlBody'], array('strip_tags' => true));
-            $description = $markdown->output();
+            $description = '';
         }
 
         // Finally, we create the task
diff --git a/app/Integration/SendgridWebhook.php b/app/Integration/SendgridWebhook.php
new file mode 100644
index 00000000..142ed49f
--- /dev/null
+++ b/app/Integration/SendgridWebhook.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Integration;
+
+use HTML_To_Markdown;
+use Core\Tool;
+
+/**
+ * Sendgrid Webhook
+ *
+ * @package  integration
+ * @author   Frederic Guillot
+ */
+class SendgridWebhook extends Base
+{
+    /**
+     * Parse incoming email
+     *
+     * @access public
+     * @param  array   $payload   Incoming email
+     * @return boolean
+     */
+    public function parsePayload(array $payload)
+    {
+        if (empty($payload['envelope']) || empty($payload['subject'])) {
+            return false;
+        }
+
+        $envelope = json_decode($payload['envelope'], true);
+        $sender = isset($envelope['to'][0]) ? $envelope['to'][0] : '';
+
+        // The user must exists in Kanboard
+        $user = $this->user->getByEmail($envelope['from']);
+
+        if (empty($user)) {
+            $this->container['logger']->debug('SendgridWebhook: ignored => user not found');
+            return false;
+        }
+
+        // The project must have a short name
+        $project = $this->project->getByIdentifier(Tool::getMailboxHash($sender));
+
+        if (empty($project)) {
+            $this->container['logger']->debug('SendgridWebhook: ignored => project not found');
+            return false;
+        }
+
+        // The user must be member of the project
+        if (! $this->projectPermission->isMember($project['id'], $user['id'])) {
+            $this->container['logger']->debug('SendgridWebhook: ignored => user is not member of the project');
+            return false;
+        }
+
+        // Get the Markdown contents
+        if (! empty($payload['html'])) {
+            $markdown = new HTML_To_Markdown($payload['html'], array('strip_tags' => true));
+            $description = $markdown->output();
+        }
+        else if (! empty($payload['text'])) {
+            $description = $payload['text'];
+        }
+        else {
+            $description = '';
+        }
+
+        // Finally, we create the task
+        return (bool) $this->taskCreation->create(array(
+            'project_id' => $project['id'],
+            'title' => $payload['subject'],
+            'description' => $description,
+            'creator_id' => $user['id'],
+        ));
+    }
+}
diff --git a/app/Locale/da_DK/translations.php b/app/Locale/da_DK/translations.php
index cc380929..f1352b8d 100644
--- a/app/Locale/da_DK/translations.php
+++ b/app/Locale/da_DK/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/de_DE/translations.php b/app/Locale/de_DE/translations.php
index 20d45977..2fc01f3e 100644
--- a/app/Locale/de_DE/translations.php
+++ b/app/Locale/de_DE/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/es_ES/translations.php b/app/Locale/es_ES/translations.php
index f1d344be..c150bfe5 100644
--- a/app/Locale/es_ES/translations.php
+++ b/app/Locale/es_ES/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/fi_FI/translations.php b/app/Locale/fi_FI/translations.php
index 728a5746..99ead93c 100644
--- a/app/Locale/fi_FI/translations.php
+++ b/app/Locale/fi_FI/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/fr_FR/translations.php b/app/Locale/fr_FR/translations.php
index 54370f3a..709131a6 100644
--- a/app/Locale/fr_FR/translations.php
+++ b/app/Locale/fr_FR/translations.php
@@ -866,4 +866,6 @@ return array(
     'Help on Postmark integration' => 'Aide sur l\'intégration avec Postmark',
     'Mailgun (incoming emails)' => 'Mailgun (emails entrants)',
     'Help on Mailgun integration' => 'Aide sur l\'intégration avec Mailgun',
+    'Sendgrid (incoming emails)' => 'Sendgrid (emails entrants)',
+    'Help on Sendgrid integration' => 'Aide sur l\'intégration avec Sendgrid',
 );
diff --git a/app/Locale/hu_HU/translations.php b/app/Locale/hu_HU/translations.php
index feca5d32..d2d0d6e9 100644
--- a/app/Locale/hu_HU/translations.php
+++ b/app/Locale/hu_HU/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/it_IT/translations.php b/app/Locale/it_IT/translations.php
index 8601af4f..c2882ffc 100644
--- a/app/Locale/it_IT/translations.php
+++ b/app/Locale/it_IT/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/ja_JP/translations.php b/app/Locale/ja_JP/translations.php
index 3a08da17..a35ff2e9 100644
--- a/app/Locale/ja_JP/translations.php
+++ b/app/Locale/ja_JP/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/nl_NL/translations.php b/app/Locale/nl_NL/translations.php
index 4a53bf48..06a7026a 100644
--- a/app/Locale/nl_NL/translations.php
+++ b/app/Locale/nl_NL/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/pl_PL/translations.php b/app/Locale/pl_PL/translations.php
index 519fb32b..c91d4ba1 100644
--- a/app/Locale/pl_PL/translations.php
+++ b/app/Locale/pl_PL/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/pt_BR/translations.php b/app/Locale/pt_BR/translations.php
index 953f3a59..1e5dae59 100644
--- a/app/Locale/pt_BR/translations.php
+++ b/app/Locale/pt_BR/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/ru_RU/translations.php b/app/Locale/ru_RU/translations.php
index dee35d70..53616d9a 100644
--- a/app/Locale/ru_RU/translations.php
+++ b/app/Locale/ru_RU/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/sr_Latn_RS/translations.php b/app/Locale/sr_Latn_RS/translations.php
index c4bab8cb..fd5c4f5d 100644
--- a/app/Locale/sr_Latn_RS/translations.php
+++ b/app/Locale/sr_Latn_RS/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/sv_SE/translations.php b/app/Locale/sv_SE/translations.php
index 22286c36..7f765815 100644
--- a/app/Locale/sv_SE/translations.php
+++ b/app/Locale/sv_SE/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/th_TH/translations.php b/app/Locale/th_TH/translations.php
index c8e253b6..f282beee 100644
--- a/app/Locale/th_TH/translations.php
+++ b/app/Locale/th_TH/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/tr_TR/translations.php b/app/Locale/tr_TR/translations.php
index 5fb403e8..11cba833 100644
--- a/app/Locale/tr_TR/translations.php
+++ b/app/Locale/tr_TR/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Locale/zh_CN/translations.php b/app/Locale/zh_CN/translations.php
index 7470bae1..09df6d45 100644
--- a/app/Locale/zh_CN/translations.php
+++ b/app/Locale/zh_CN/translations.php
@@ -864,4 +864,6 @@ return array(
     // 'Help on Postmark integration' => '',
     // 'Mailgun (incoming emails)' => '',
     // 'Help on Mailgun integration' => '',
+    // 'Sendgrid (incoming emails)' => '',
+    // 'Help on Sendgrid integration' => '',
 );
diff --git a/app/Model/User.php b/app/Model/User.php
index d9f174bd..be2b034b 100644
--- a/app/Model/User.php
+++ b/app/Model/User.php
@@ -150,6 +150,10 @@ class User extends Base
      */
     public function getByEmail($email)
     {
+        if (empty($email)) {
+            return false;
+        }
+
         return $this->db->table(self::TABLE)->eq('email', $email)->findOne();
     }
 
diff --git a/app/ServiceProvider/ClassProvider.php b/app/ServiceProvider/ClassProvider.php
index de9de546..a64ac061 100644
--- a/app/ServiceProvider/ClassProvider.php
+++ b/app/ServiceProvider/ClassProvider.php
@@ -78,6 +78,7 @@ class ClassProvider implements ServiceProviderInterface
             'BitbucketWebhook',
             'Hipchat',
             'MailgunWebhook',
+            'SendgridWebhook',
             'SlackWebhook',
             'PostmarkWebhook',
         )
diff --git a/app/Template/config/integrations.php b/app/Template/config/integrations.php
index a012b566..bf051cfc 100644
--- a/app/Template/config/integrations.php
+++ b/app/Template/config/integrations.php
@@ -12,6 +12,12 @@
     <p class="form-help"><a href="http://kanboard.net/documentation/mailgun" target="_blank"><?= t('Help on Mailgun integration') ?></a></p>
     </div>
 
+    <h3><img src="assets/img/sendgrid-icon.png"/>&nbsp;<?= t('Sendgrid (incoming emails)') ?></h3>
+    <div class="listing">
+    <input type="text" class="auto-select" readonly="readonly" value="<?= $this->getCurrentBaseUrl().$this->u('webhook', 'sendgrid', array('token' => $values['webhook_token'])) ?>"/><br/>
+    <p class="form-help"><a href="http://kanboard.net/documentation/sendgrid" target="_blank"><?= t('Help on Sendgrid integration') ?></a></p>
+    </div>
+
     <h3><img src="assets/img/postmark-icon.png"/>&nbsp;<?= t('Postmark (incoming emails)') ?></h3>
     <div class="listing">
     <input type="text" class="auto-select" readonly="readonly" value="<?= $this->getCurrentBaseUrl().$this->u('webhook', 'postmark', array('token' => $values['webhook_token'])) ?>"/><br/>
diff --git a/assets/img/chosen-sprite.png b/assets/img/chosen-sprite.png
index 3611ae4a..3611ae4a 100755..100644
--- a/assets/img/chosen-sprite.png
+++ b/assets/img/chosen-sprite.png
diff --git a/assets/img/chosen-sprite@2x.png b/assets/img/chosen-sprite@2x.png
index ffe4d7d1..ffe4d7d1 100755..100644
--- a/assets/img/chosen-sprite@2x.png
+++ b/assets/img/chosen-sprite@2x.png
diff --git a/assets/img/sendgrid-icon.png b/assets/img/sendgrid-icon.png
new file mode 100644
index 00000000..4247e27b
--- /dev/null
+++ b/assets/img/sendgrid-icon.png
diff --git a/docs/create-tasks-by-email.markdown b/docs/create-tasks-by-email.markdown
new file mode 100644
index 00000000..46dae480
--- /dev/null
+++ b/docs/create-tasks-by-email.markdown
@@ -0,0 +1,44 @@
+Create tasks by email
+=====================
+
+You can create tasks directly by sending an email.
+
+At the moment, Kanboard is integrated with 3 external services:
+
+- [Mailgun](http://kanboard.net/documentation/mailgun)
+- [Sendgrid](http://kanboard.net/documentation/sendgrid)
+- [Postmark](http://kanboard.net/documentation/postmark)
+
+These services handle incoming emails without having to configure any SMTP server.
+
+When an email is received, Kanboard receive the message on a specific end-point.
+All complicated works are already handled by those services.
+
+Incoming emails workflow
+------------------------
+
+1. You send an email to a specific address, by example **something+myproject@inbound.mydomain.tld**
+2. Your email is forwarded to the third-party SMTP servers
+3. The SMTP provider call the Kanboard webhook with the email in JSON or multipart/form-data formats
+4. Kanboard parse the received email and create the task to the right project
+
+Note: New tasks are automatically created in the first column.
+
+Email format
+------------
+
+- The local part of the email address must use the plus separator, by example **kanboard+project123**
+- The string defined after the plus sign must match a project identifier, by example **project123** is the identifier of the project **Project 123**
+- The email subject becomes the task title
+- The email body becomes the task description (Markdown format)
+
+Incoming emails can be written in text or HTML formats.
+**Kanboard is able to convert simple HTML emails to Markdown**.
+
+Security and requirements
+-------------------------
+
+- The Kanboard webhook is protected by a random token
+- The sender email address must match a Kanboard user
+- The Kanboard project must have a unique identifier, by example **MYPROJECT**
+- The Kanboard user must be member of the project
diff --git a/docs/mailgun.markdown b/docs/mailgun.markdown
index a1dbe41b..03b70cf9 100644
--- a/docs/mailgun.markdown
+++ b/docs/mailgun.markdown
@@ -6,34 +6,7 @@ You can use the service [Mailgun](http://www.mailgun.com/) to create tasks direc
 This integration works with the inbound email service of Mailgun (routes).
 Kanboard use a webhook to handle incoming emails.
 
-Incoming emails workflow
-------------------------
-
-1. You send an email to a specific address, by example **something+myproject@inbound.mydomain.tld**
-2. Your email is forwarded to Mailgun SMTP servers
-3. Mailgun call the Kanboard webhook with the email in JSON format
-4. Kanboard parse the received email and create the task to the right project
-
-Note: New tasks are automatically created in the first column.
-
-Email format
-------------
-
-- The local part of the email address must use the plus separator, by example **kanboard+project123**
-- The string defined after the plus sign must match a project identifier, by example **project123** is the identifier of the project **Project 123**
-- The email subject becomes the task title
-- The email body becomes the task description (Markdown format)
-
-Incoming emails can be written in text or HTML formats.
-**Kanboard is able to convert simple HTML emails to Markdown**.
-
-Security and requirements
--------------------------
-
-- The Kanboard webhook is protected by a random token
-- The sender email address must match a Kanboard user
-- The Kanboard project must have a unique identifier, by example **MYPROJECT**
-- The Kanboard user must be member of the project
+The [incoming email workflow is described here](http://kanboard.net/documentation/email-tasks).
 
 Mailgun configuration
 ---------------------
@@ -53,9 +26,3 @@ Kanboard configuration
 1. Be sure that your users have an email address in their profiles
 2. Assign a project identifier to the desired projects: **Project settings > Edit**
 3. Try to send an email to your project
-
-Troubleshootings
-----------------
-
-- Test if your route match in the console
-- Double-check requirements mentioned above
diff --git a/docs/postmark.markdown b/docs/postmark.markdown
index 681ec5a2..a859961c 100644
--- a/docs/postmark.markdown
+++ b/docs/postmark.markdown
@@ -6,40 +6,15 @@ You can use the service [Postmark](https://postmarkapp.com/) to create tasks dir
 This integration works with the inbound email service of Postmark.
 Kanboard use a webhook to handle incoming emails.
 
-Incoming emails workflow
-------------------------
-
-1. You send an email to a specific address, by example **something+myproject@inbound.mydomain.tld**
-2. Your email is forwarded to Postmark SMTP servers
-3. Postmark call the Kanboard webhook with the email in JSON format
-4. Kanboard parse the received email and create the task to the right project
-
-Note: New tasks are automatically created in the first column.
-
-Email format
-------------
-
-- The local part of the email address must use the plus separator, by example **kanboard+project123**
-- The string defined after the plus sign must match a project identifier, by example **project123** is the identifier of the project **Project 123**
-- The email subject becomes the task title
-- The email body becomes the task description (Markdown format)
-
-Incoming emails can be written in text or HTML formats.
-**Kanboard is able to convert simple HTML emails to Markdown**.
-
-Security and requirements
--------------------------
-
-- The Kanboard webhook is protected by a random token
-- The sender email address (From header) must match a Kanboard user
-- The Kanboard project must have a unique identifier, by example **MYPROJECT**
-- The Kanboard user must be member of the project
+The [incoming email workflow is described here](http://kanboard.net/documentation/email-tasks).
 
 Postmark configuration
 ----------------------
 
-- Follow the [official documentation about inbound email processing](http://developer.postmarkapp.com/developer-process-configure.html)
-- The Kanboard webhook url is displayed in **Settings > Integrations > Postmark**
+Just follow the [official documentation about inbound email processing](http://developer.postmarkapp.com/developer-process-configure.html).
+Basically, you have to forward your own domain or subdomain to a specific Postmark email address.
+
+The Kanboard webhook url is displayed in **Settings > Integrations > Postmark**
 
 Kanboard configuration
 ----------------------
@@ -52,4 +27,3 @@ Troubleshootings
 ----------------
 
 - Test the webhook url from the Postmark console, you should have a status code `200 OK`
-- Double-check requirements mentioned above
diff --git a/docs/sendgrid.markdown b/docs/sendgrid.markdown
new file mode 100644
index 00000000..5c7bb835
--- /dev/null
+++ b/docs/sendgrid.markdown
@@ -0,0 +1,24 @@
+Sendgrid
+========
+
+You can use the service [Sendgrid](https://sendgrid.com/) to create tasks directly by email.
+
+This integration works with the [Parse API of Sendgrid](https://sendgrid.com/docs/API_Reference/Webhooks/parse.html).
+Kanboard use a webhook to handle incoming emails.
+
+The [incoming email workflow is described here](http://kanboard.net/documentation/email-tasks).
+
+Sendgrid configuration
+----------------------
+
+1. Create a new domain or subdomain (by example **inbound.mydomain.tld**) with a MX record that point to **mx.sendgrid.net**
+2. Add your domain and the Kanboard webhook url to [the configuration page in Sendgrid](https://sendgrid.com/developer/reply)
+
+The Kanboard webhook url is displayed in **Settings > Integrations > Sendgrid**
+
+Kanboard configuration
+----------------------
+
+1. Be sure that your users have an email address in their profiles
+2. Assign a project identifier to the desired projects: **Project settings > Edit**
+3. Try to send an email to your project
diff --git a/tests/units/ProjectTest.php b/tests/units/ProjectTest.php
index 231d403f..9f49af8a 100644
--- a/tests/units/ProjectTest.php
+++ b/tests/units/ProjectTest.php
@@ -231,6 +231,9 @@ class ProjectTest extends Base
         $this->assertNotEmpty($project);
         $this->assertEquals('TEST1', $project['identifier']);
 
+        $project = $p->getByIdentifier('');
+        $this->assertFalse($project);
+
         // Validation rules
         $r = $p->validateCreation(array('name' => 'test', 'identifier' => 'TEST1'));
         $this->assertFalse($r[0]);
diff --git a/tests/units/SendgridWebhookTest.php b/tests/units/SendgridWebhookTest.php
new file mode 100644
index 00000000..3b30d212
--- /dev/null
+++ b/tests/units/SendgridWebhookTest.php
@@ -0,0 +1,107 @@
+<?php
+
+require_once __DIR__.'/Base.php';
+
+use Integration\SendgridWebhook;
+use Model\TaskCreation;
+use Model\TaskFinder;
+use Model\Project;
+use Model\ProjectPermission;
+use Model\User;
+
+class SendgridWebhookTest extends Base
+{
+    public function testHandlePayload()
+    {
+        $w = new SendgridWebhook($this->container);
+        $p = new Project($this->container);
+        $pp = new ProjectPermission($this->container);
+        $u = new User($this->container);
+        $tc = new TaskCreation($this->container);
+        $tf = new TaskFinder($this->container);
+
+        $this->assertEquals(2, $u->create(array('name' => 'me', 'email' => 'me@localhost')));
+
+        $this->assertEquals(1, $p->create(array('name' => 'test1')));
+        $this->assertEquals(2, $p->create(array('name' => 'test2', 'identifier' => 'TEST1')));
+
+        // Empty payload
+        $this->assertFalse($w->parsePayload(array()));
+
+        // Unknown user
+        $this->assertFalse($w->parsePayload(array(
+            'envelope' => '{"to":["a@b.c"],"from":"a.b.c"}',
+            'subject' => 'Email task'
+        )));
+
+        // Project not found
+        $this->assertFalse($w->parsePayload(array(
+            'envelope' => '{"to":["a@b.c"],"from":"me@localhost"}',
+            'subject' => 'Email task'
+        )));
+
+        // User is not member
+        $this->assertFalse($w->parsePayload(array(
+            'envelope' => '{"to":["something+test1@localhost"],"from":"me@localhost"}',
+            'subject' => 'Email task'
+        )));
+
+        $this->assertTrue($pp->addMember(2, 2));
+
+        // The task must be created
+        $this->assertTrue($w->parsePayload(array(
+            'envelope' => '{"to":["something+test1@localhost"],"from":"me@localhost"}',
+            'subject' => 'Email task'
+        )));
+
+        $task = $tf->getById(1);
+        $this->assertNotEmpty($task);
+        $this->assertEquals(2, $task['project_id']);
+        $this->assertEquals('Email task', $task['title']);
+        $this->assertEquals('', $task['description']);
+        $this->assertEquals(2, $task['creator_id']);
+
+        // Html content
+        $this->assertTrue($w->parsePayload(array(
+            'envelope' => '{"to":["something+test1@localhost"],"from":"me@localhost"}',
+            'subject' => 'Email task',
+            'html' => '<strong>bold</strong> text',
+        )));
+
+        $task = $tf->getById(2);
+        $this->assertNotEmpty($task);
+        $this->assertEquals(2, $task['project_id']);
+        $this->assertEquals('Email task', $task['title']);
+        $this->assertEquals('**bold** text', $task['description']);
+        $this->assertEquals(2, $task['creator_id']);
+
+        // Text content
+        $this->assertTrue($w->parsePayload(array(
+            'envelope' => '{"to":["something+test1@localhost"],"from":"me@localhost"}',
+            'subject' => 'Email task',
+            'text' => '**bold** text',
+        )));
+
+        $task = $tf->getById(3);
+        $this->assertNotEmpty($task);
+        $this->assertEquals(2, $task['project_id']);
+        $this->assertEquals('Email task', $task['title']);
+        $this->assertEquals('**bold** text', $task['description']);
+        $this->assertEquals(2, $task['creator_id']);
+
+        // Text + html content
+        $this->assertTrue($w->parsePayload(array(
+            'envelope' => '{"to":["something+test1@localhost"],"from":"me@localhost"}',
+            'subject' => 'Email task',
+            'html' => '<strong>bold</strong> html',
+            'text' => '**bold** text',
+        )));
+
+        $task = $tf->getById(4);
+        $this->assertNotEmpty($task);
+        $this->assertEquals(2, $task['project_id']);
+        $this->assertEquals('Email task', $task['title']);
+        $this->assertEquals('**bold** html', $task['description']);
+        $this->assertEquals(2, $task['creator_id']);
+    }
+}
diff --git a/tests/units/ToolTest.php b/tests/units/ToolTest.php
new file mode 100644
index 00000000..4a62fe3b
--- /dev/null
+++ b/tests/units/ToolTest.php
@@ -0,0 +1,15 @@
+<?php
+
+require_once __DIR__.'/Base.php';
+
+use Core\Tool;
+
+class ToolTest extends Base
+{
+    public function testMailboxHash()
+    {
+        $this->assertEquals('test1', Tool::getMailboxHash('a+test1@localhost'));
+        $this->assertEquals('', Tool::getMailboxHash('test1@localhost'));
+        $this->assertEquals('', Tool::getMailboxHash('test1'));
+    }
+}
diff --git a/tests/units/UserTest.php b/tests/units/UserTest.php
index c4094ea2..a946621c 100644
--- a/tests/units/UserTest.php
+++ b/tests/units/UserTest.php
@@ -10,6 +10,16 @@ use Model\Project;
 
 class UserTest extends Base
 {
+    public function testGetByEmail()
+    {
+        $u = new User($this->container);
+        $this->assertNotFalse($u->create(array('username' => 'user1', 'password' => '123456', 'email' => 'user1@localhost')));
+        $this->assertNotFalse($u->create(array('username' => 'user2', 'password' => '123456', 'email' => '')));
+
+        $this->assertNotEmpty($u->getByEmail('user1@localhost'));
+        $this->assertEmpty($u->getByEmail(''));
+    }
+
     public function testPassword()
     {
         $password = 'test123';