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# Reply by email
GitLab can be set up to allow users to comment on issues and merge requests by replying to notification emails.
## Get a mailbox
Reply by email requires an IMAP-enabled email account, with a provider or server that supports [email sub-addressing](https://en.wikipedia.org/wiki/Email_address#Sub-addressing). Sub-addressing is a feature where any email to `user+some_arbitrary_tag@example.com` will end up in the mailbox for `user@example.com`, and is supported by providers such as Gmail, Yahoo! Mail, Outlook.com and iCloud, as well as the Postfix mail server which you can run on-premises.
If you want to use Gmail with Reply by email, make sure you have [IMAP access enabled](https://support.google.com/mail/troubleshooter/1668960?hl=en#ts=1665018) and [allow less secure apps to access the account](https://support.google.com/accounts/answer/6010255).
To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these instructions](./postfix.md).
## Set it up
In this example, we'll use the Gmail address `gitlab-incoming@gmail.com`.
### Omnibus package installations
1. Find the `incoming_email` section in `/etc/gitlab/gitlab.rb`, enable the feature, enter the email address including a placeholder for the `key` and fill in the details for your specific IMAP server and email account:
```ruby
gitlab_rails['incoming_email_enabled'] = true
gitlab_rails['incoming_email_address'] = "gitlab-incoming+%{key}@gmail.com"
gitlab_rails['incoming_email_host'] = "imap.gmail.com" # IMAP server host
gitlab_rails['incoming_email_port'] = 993 # IMAP server port
gitlab_rails['incoming_email_ssl'] = true # Whether the IMAP server uses SSL
gitlab_rails['incoming_email_email'] = "gitlab-incoming@gmail.com" # Email account username. Usually the full email address.
gitlab_rails['incoming_email_password'] = "password" # Email account password
gitlab_rails['incoming_email_mailbox_name'] = "inbox" # The name of the mailbox where incoming mail will end up. Usually "inbox".
```
As mentioned, the part after `+` in the address is ignored, and any email sent here will end up in the mailbox for `gitlab-incoming@gmail.com`.
1. Reconfigure GitLab for the changes to take effect:
```sh
sudo gitlab-ctl reconfigure
```
1. Verify that everything is configured correctly:
```sh
sudo gitlab-rake gitlab:incoming_email:check
```
1. Reply by email should now be working.
### Installations from source
1. Go to the GitLab installation directory:
```sh
cd /home/git/gitlab
```
1. Find the `incoming_email` section in `config/gitlab.yml`, enable the feature and enter the email address including a placeholder for the `key`:
```sh
sudo editor config/gitlab.yml
```
```yaml
incoming_email:
enabled: true
address: "gitlab-incoming+%{key}@gmail.com"
```
As mentioned, the part after `+` in the address is ignored, and any email sent here will end up in the mailbox for `gitlab-incoming@gmail.com`.
2. Copy `config/mail_room.yml.example` to `config/mail_room.yml`:
```sh
sudo cp config/mail_room.yml.example config/mail_room.yml
```
3. Uncomment the configuration options in `config/mail_room.yml` and fill in the details for your specific IMAP server and email account:
```sh
sudo editor config/mail_room.yml
```
```yaml
:mailboxes:
-
# IMAP server host
:host: "imap.gmail.com"
# IMAP server port
:port: 993
# Whether the IMAP server uses SSL
:ssl: true
# Email account username. Usually the full email address.
:email: "gitlab-incoming@gmail.com"
# Email account password
:password: "[REDACTED]"
# The name of the mailbox where incoming mail will end up. Usually "inbox".
:name: "inbox"
# Always "sidekiq".
:delivery_method: sidekiq
# Always true.
:delete_after_delivery: true
:delivery_options:
# The URL to the Redis server used by Sidekiq. Should match the URL in config/resque.yml.
:redis_url: redis://localhost:6379
# Always "resque:gitlab".
:namespace: resque:gitlab
# Always "incoming_email".
:queue: incoming_email
# Always "EmailReceiverWorker"
:worker: EmailReceiverWorker
```
5. Edit the init script configuration at `/etc/default/gitlab` to enable `mail_room`:
```sh
sudo mkdir -p /etc/default
echo 'mail_room_enabled=true' | sudo tee -a /etc/default/gitlab
```
6. Restart GitLab:
```sh
sudo service gitlab restart
```
7. Verify that everything is configured correctly:
```sh
sudo -u git -H bundle exec rake gitlab:incoming_email:check RAILS_ENV=production
```
8. Reply by email should now be working.
### Development
1. Go to the GitLab installation directory.
1. Find the `incoming_email` section in `config/gitlab.yml`, enable the feature and enter the email address including a placeholder for the `key`:
```yaml
incoming_email:
enabled: true
address: "gitlab-incoming+%{key}@gmail.com"
```
As mentioned, the part after `+` is ignored, and this will end up in the mailbox for `gitlab-incoming@gmail.com`.
2. Copy `config/mail_room.yml.example` to `config/mail_room.yml`:
```sh
sudo cp config/mail_room.yml.example config/mail_room.yml
```
3. Uncomment the configuration options in `config/mail_room.yml` and fill in the details for your specific IMAP server and email account:
```yaml
:mailboxes:
-
# IMAP server host
:host: "imap.gmail.com"
# IMAP server port
:port: 993
# Whether the IMAP server uses SSL
:ssl: true
# Email account username. Usually the full email address.
:email: "gitlab-incoming@gmail.com"
# Email account password
:password: "[REDACTED]"
# The name of the mailbox where incoming mail will end up. Usually "inbox".
:name: "inbox"
# Always "sidekiq".
:delivery_method: sidekiq
# Always true.
:delete_after_delivery: true
:delivery_options:
# The URL to the Redis server used by Sidekiq. Should match the URL in config/resque.yml.
:redis_url: redis://localhost:6379
# Always "resque:gitlab".
:namespace: resque:gitlab
# Always "incoming_email".
:queue: incoming_email
# Always "EmailReceiverWorker"
:worker: EmailReceiverWorker
```
4. Uncomment the `mail_room` line in your `Procfile`:
```yaml
mail_room: bundle exec mail_room -q -c config/mail_room.yml
```
6. Restart GitLab:
```sh
bundle exec foreman start
```
7. Verify that everything is configured correctly:
```sh
bundle exec rake gitlab:incoming_email:check RAILS_ENV=development
```
8. Reply by email should now be working.
|
