2018-03-02 11:32:39 +00:00
|
|
|
# Incoming email
|
|
|
|
|
|
|
|
GitLab has several features based on receiving incoming emails:
|
|
|
|
|
|
|
|
- [Reply by Email](reply_by_email.md): allow GitLab users to comment on issues
|
|
|
|
and merge requests by replying to notification emails.
|
2019-07-04 00:55:35 +00:00
|
|
|
- [New issue by email](../user/project/issues/managing_issues.md#new-issue-via-email):
|
2018-03-02 11:32:39 +00:00
|
|
|
allow GitLab users to create a new issue by sending an email to a
|
|
|
|
user-specific email address.
|
|
|
|
- [New merge request by email](../user/project/merge_requests/index.md#create-new-merge-requests-by-email):
|
|
|
|
allow GitLab users to create a new merge request by sending an email to a
|
|
|
|
user-specific email address.
|
2019-06-05 03:29:33 +00:00
|
|
|
- [Service Desk](../user/project/service_desk.md): provide e-mail support to
|
2019-07-08 08:50:38 +00:00
|
|
|
your customers through GitLab. **(PREMIUM)**
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
## Requirements
|
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
Handling incoming emails requires an [IMAP](https://en.wikipedia.org/wiki/Internet_Message_Access_Protocol)-enabled
|
|
|
|
email account. GitLab requires one of the following three strategies:
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
- Email sub-addressing (recommended)
|
2018-03-02 11:32:39 +00:00
|
|
|
- Catch-all mailbox
|
2019-01-08 00:12:59 +00:00
|
|
|
- Dedicated email address (supports Reply by Email only)
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
Let's walk through each of these options.
|
|
|
|
|
|
|
|
### Email sub-addressing
|
|
|
|
|
|
|
|
[Sub-addressing](https://en.wikipedia.org/wiki/Email_address#Sub-addressing) is
|
2019-01-08 00:12:59 +00:00
|
|
|
a mail server feature where any email to `user+arbitrary_tag@example.com` will end up
|
|
|
|
in the mailbox for `user@example.com` . It is supported by providers such as
|
|
|
|
Gmail, Google Apps, Yahoo! Mail, Outlook.com, and iCloud, as well as the
|
|
|
|
[Postfix mail server](reply_by_email_postfix_setup.md), which you can run on-premises.
|
|
|
|
|
|
|
|
TIP: **Tip:**
|
|
|
|
If your provider or server supports email sub-addressing, we recommend using it.
|
|
|
|
A dedicated email address only supports Reply by Email functionality.
|
|
|
|
A catch-all mailbox supports the same features as sub-addressing as of GitLab 11.7,
|
|
|
|
but sub-addressing is still preferred because only one email address is used,
|
|
|
|
leaving a catch-all available for other purposes beyond GitLab.
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
### Catch-all mailbox
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
A [catch-all mailbox](https://en.wikipedia.org/wiki/Catch-all) for a domain
|
|
|
|
receives all emails addressed to the domain that do not match any addresses that
|
|
|
|
exist on the mail server.
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
As of GitLab 11.7, catch-all mailboxes support the same features as
|
|
|
|
email sub-addressing, but email sub-addressing remains our recommendation so that you
|
|
|
|
can reserve your catch-all mailbox for other purposes.
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
### Dedicated email address
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
This solution is relatively simple to set up: you just need to create an email
|
|
|
|
address dedicated to receive your users' replies to GitLab notifications. However,
|
|
|
|
this method only supports replies, and not the other features of [incoming email](#incoming-email).
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
## Set it up
|
|
|
|
|
|
|
|
If you want to use Gmail / Google Apps for incoming emails, make sure you have
|
|
|
|
[IMAP access enabled](https://support.google.com/mail/troubleshooter/1668960?hl=en#ts=1665018)
|
|
|
|
and [allowed less secure apps to access the account](https://support.google.com/accounts/answer/6010255)
|
|
|
|
or [turn-on 2-step validation](https://support.google.com/accounts/answer/185839)
|
|
|
|
and use [an application password](https://support.google.com/mail/answer/185833).
|
|
|
|
|
|
|
|
To set up a basic Postfix mail server with IMAP access on Ubuntu, follow the
|
|
|
|
[Postfix setup documentation](reply_by_email_postfix_setup.md).
|
|
|
|
|
|
|
|
### Security Concerns
|
|
|
|
|
|
|
|
**WARNING:** Be careful when choosing the domain used for receiving incoming
|
|
|
|
email.
|
|
|
|
|
|
|
|
For the sake of example, suppose your top-level company domain is `hooli.com`.
|
|
|
|
All employees in your company have an email address at that domain via Google
|
|
|
|
Apps, and your company's private Slack instance requires a valid `@hooli.com`
|
|
|
|
email address in order to sign up.
|
|
|
|
|
|
|
|
If you also host a public-facing GitLab instance at `hooli.com` and set your
|
|
|
|
incoming email domain to `hooli.com`, an attacker could abuse the "Create new
|
|
|
|
issue by email" or
|
|
|
|
"[Create new merge request by email](../user/project/merge_requests/index.md#create-new-merge-requests-by-email)"
|
|
|
|
features by using a project's unique address as the email when signing up for
|
|
|
|
Slack, which would send a confirmation email, which would create a new issue or
|
|
|
|
merge request on the project owned by the attacker, allowing them to click the
|
|
|
|
confirmation link and validate their account on your company's private Slack
|
|
|
|
instance.
|
|
|
|
|
|
|
|
We recommend receiving incoming email on a subdomain, such as
|
|
|
|
`incoming.hooli.com`, and ensuring that you do not employ any services that
|
|
|
|
authenticate solely based on access to an email domain such as `*.hooli.com.`
|
|
|
|
Alternatively, use a dedicated domain for GitLab email communications such as
|
|
|
|
`hooli-gitlab.com`.
|
|
|
|
|
|
|
|
See GitLab issue [#30366](https://gitlab.com/gitlab-org/gitlab-ce/issues/30366)
|
|
|
|
for a real-world example of this exploit.
|
|
|
|
|
|
|
|
### Omnibus package installations
|
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
1. Find the `incoming_email` section in `/etc/gitlab/gitlab.rb`, enable the feature
|
|
|
|
and fill in the details for your specific IMAP server and email account (see [examples](#config-examples) below).
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
1. Reconfigure GitLab for the changes to take effect:
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
sudo gitlab-ctl reconfigure
|
|
|
|
sudo gitlab-ctl restart
|
|
|
|
```
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
1. Verify that everything is configured correctly:
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
sudo gitlab-rake gitlab:incoming_email:check
|
|
|
|
```
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
Reply by email should now be working.
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
### Installations from source
|
|
|
|
|
|
|
|
1. Go to the GitLab installation directory:
|
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
cd /home/git/gitlab
|
|
|
|
```
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
1. Find the `incoming_email` section in `config/gitlab.yml`, enable the feature
|
|
|
|
and fill in the details for your specific IMAP server and email account (see [examples](#config-examples) below).
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
1. Enable `mail_room` in the init script at `/etc/default/gitlab`:
|
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
sudo mkdir -p /etc/default
|
|
|
|
echo 'mail_room_enabled=true' | sudo tee -a /etc/default/gitlab
|
|
|
|
```
|
2019-02-21 04:02:10 +00:00
|
|
|
|
|
|
|
1. Restart GitLab:
|
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
sudo service gitlab restart
|
|
|
|
```
|
2019-02-21 04:02:10 +00:00
|
|
|
|
|
|
|
1. Verify that everything is configured correctly:
|
|
|
|
|
2019-07-09 07:16:17 +00:00
|
|
|
```sh
|
|
|
|
sudo -u git -H bundle exec rake gitlab:incoming_email:check RAILS_ENV=production
|
|
|
|
```
|
2019-02-21 04:02:10 +00:00
|
|
|
|
|
|
|
Reply by email should now be working.
|
|
|
|
|
|
|
|
### Config examples
|
|
|
|
|
|
|
|
#### Postfix
|
|
|
|
|
2019-08-23 08:50:24 +00:00
|
|
|
Example configuration for Postfix mail server. Assumes mailbox `incoming@gitlab.example.com`.
|
2019-02-21 04:02:10 +00:00
|
|
|
|
|
|
|
Example for Omnibus installs:
|
|
|
|
|
|
|
|
```ruby
|
|
|
|
gitlab_rails['incoming_email_enabled'] = true
|
|
|
|
|
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
|
|
|
gitlab_rails['incoming_email_address'] = "incoming+%{key}@gitlab.example.com"
|
|
|
|
|
|
|
|
# Email account username
|
|
|
|
# With third party providers, this is usually the full email address.
|
|
|
|
# With self-hosted email servers, this is usually the user part of the email address.
|
|
|
|
gitlab_rails['incoming_email_email'] = "incoming"
|
|
|
|
# Email account password
|
|
|
|
gitlab_rails['incoming_email_password'] = "[REDACTED]"
|
|
|
|
|
|
|
|
# IMAP server host
|
|
|
|
gitlab_rails['incoming_email_host'] = "gitlab.example.com"
|
|
|
|
# IMAP server port
|
|
|
|
gitlab_rails['incoming_email_port'] = 143
|
|
|
|
# Whether the IMAP server uses SSL
|
|
|
|
gitlab_rails['incoming_email_ssl'] = false
|
|
|
|
# Whether the IMAP server uses StartTLS
|
|
|
|
gitlab_rails['incoming_email_start_tls'] = false
|
|
|
|
|
|
|
|
# The mailbox where incoming mail will end up. Usually "inbox".
|
|
|
|
gitlab_rails['incoming_email_mailbox_name'] = "inbox"
|
|
|
|
# The IDLE command timeout.
|
|
|
|
gitlab_rails['incoming_email_idle_timeout'] = 60
|
|
|
|
```
|
|
|
|
|
|
|
|
Example for source installs:
|
|
|
|
|
|
|
|
```yaml
|
|
|
|
incoming_email:
|
|
|
|
enabled: true
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
2019-02-21 04:02:10 +00:00
|
|
|
address: "incoming+%{key}@gitlab.example.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# Email account username
|
|
|
|
# With third party providers, this is usually the full email address.
|
|
|
|
# With self-hosted email servers, this is usually the user part of the email address.
|
2019-02-21 04:02:10 +00:00
|
|
|
user: "incoming"
|
2018-03-02 11:32:39 +00:00
|
|
|
# Email account password
|
2019-02-21 04:02:10 +00:00
|
|
|
password: "[REDACTED]"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# IMAP server host
|
2019-02-21 04:02:10 +00:00
|
|
|
host: "gitlab.example.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
# IMAP server port
|
2019-02-21 04:02:10 +00:00
|
|
|
port: 143
|
2018-03-02 11:32:39 +00:00
|
|
|
# Whether the IMAP server uses SSL
|
2019-02-21 04:02:10 +00:00
|
|
|
ssl: false
|
2018-03-02 11:32:39 +00:00
|
|
|
# Whether the IMAP server uses StartTLS
|
2019-02-21 04:02:10 +00:00
|
|
|
start_tls: false
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# The mailbox where incoming mail will end up. Usually "inbox".
|
2019-02-21 04:02:10 +00:00
|
|
|
mailbox: "inbox"
|
2018-03-02 11:32:39 +00:00
|
|
|
# The IDLE command timeout.
|
2019-02-21 04:02:10 +00:00
|
|
|
idle_timeout: 60
|
|
|
|
```
|
|
|
|
|
|
|
|
#### Gmail
|
|
|
|
|
2019-08-23 08:50:24 +00:00
|
|
|
Example configuration for Gmail/G Suite. Assumes mailbox `gitlab-incoming@gmail.com`.
|
2019-02-21 04:02:10 +00:00
|
|
|
|
|
|
|
Example for Omnibus installs:
|
|
|
|
|
|
|
|
```ruby
|
|
|
|
gitlab_rails['incoming_email_enabled'] = true
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
|
|
|
gitlab_rails['incoming_email_address'] = "gitlab-incoming+%{key}@gmail.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# Email account username
|
|
|
|
# With third party providers, this is usually the full email address.
|
|
|
|
# With self-hosted email servers, this is usually the user part of the email address.
|
|
|
|
gitlab_rails['incoming_email_email'] = "gitlab-incoming@gmail.com"
|
|
|
|
# Email account password
|
|
|
|
gitlab_rails['incoming_email_password'] = "[REDACTED]"
|
|
|
|
|
|
|
|
# IMAP server host
|
|
|
|
gitlab_rails['incoming_email_host'] = "imap.gmail.com"
|
|
|
|
# IMAP server port
|
|
|
|
gitlab_rails['incoming_email_port'] = 993
|
|
|
|
# Whether the IMAP server uses SSL
|
|
|
|
gitlab_rails['incoming_email_ssl'] = true
|
|
|
|
# Whether the IMAP server uses StartTLS
|
|
|
|
gitlab_rails['incoming_email_start_tls'] = false
|
|
|
|
|
|
|
|
# The mailbox where incoming mail will end up. Usually "inbox".
|
|
|
|
gitlab_rails['incoming_email_mailbox_name'] = "inbox"
|
|
|
|
# The IDLE command timeout.
|
|
|
|
gitlab_rails['incoming_email_idle_timeout'] = 60
|
|
|
|
```
|
|
|
|
|
|
|
|
Example for source installs:
|
|
|
|
|
|
|
|
```yaml
|
|
|
|
incoming_email:
|
|
|
|
enabled: true
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-01-08 00:12:59 +00:00
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
2019-02-21 04:02:10 +00:00
|
|
|
address: "gitlab-incoming+%{key}@gmail.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# Email account username
|
2019-02-21 04:02:10 +00:00
|
|
|
# With third party providers, this is usually the full email address.
|
|
|
|
# With self-hosted email servers, this is usually the user part of the email address.
|
|
|
|
user: "gitlab-incoming@gmail.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
# Email account password
|
2019-02-21 04:02:10 +00:00
|
|
|
password: "[REDACTED]"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
|
|
|
# IMAP server host
|
2019-02-21 04:02:10 +00:00
|
|
|
host: "imap.gmail.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
# IMAP server port
|
2019-02-21 04:02:10 +00:00
|
|
|
port: 993
|
2018-03-02 11:32:39 +00:00
|
|
|
# Whether the IMAP server uses SSL
|
2019-02-21 04:02:10 +00:00
|
|
|
ssl: true
|
|
|
|
# Whether the IMAP server uses StartTLS
|
|
|
|
start_tls: false
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# The mailbox where incoming mail will end up. Usually "inbox".
|
|
|
|
mailbox: "inbox"
|
|
|
|
# The IDLE command timeout.
|
|
|
|
idle_timeout: 60
|
|
|
|
```
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
#### MS Exchange
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
Example configuration for Microsoft Exchange mail server with IMAP enabled. Assumes the
|
|
|
|
catch-all mailbox incoming@exchange.example.com.
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
Example for Omnibus installs:
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
```ruby
|
|
|
|
gitlab_rails['incoming_email_enabled'] = true
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
|
|
|
# Exchange does not support sub-addressing, so a catch-all mailbox must be used.
|
|
|
|
gitlab_rails['incoming_email_address'] = "incoming-%{key}@exchange.example.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# Email account username
|
|
|
|
# Typically this is the userPrincipalName (UPN)
|
|
|
|
gitlab_rails['incoming_email_email'] = "incoming@ad-domain.example.com"
|
|
|
|
# Email account password
|
|
|
|
gitlab_rails['incoming_email_password'] = "[REDACTED]"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# IMAP server host
|
|
|
|
gitlab_rails['incoming_email_host'] = "exchange.example.com"
|
|
|
|
# IMAP server port
|
|
|
|
gitlab_rails['incoming_email_port'] = 993
|
|
|
|
# Whether the IMAP server uses SSL
|
|
|
|
gitlab_rails['incoming_email_ssl'] = true
|
|
|
|
```
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
Example for source installs:
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
```yaml
|
|
|
|
incoming_email:
|
|
|
|
enabled: true
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
|
|
|
|
# The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
|
|
|
|
# Exchange does not support sub-addressing, so a catch-all mailbox must be used.
|
|
|
|
address: "incoming-%{key}@exchange.example.com"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# Email account username
|
|
|
|
# Typically this is the userPrincipalName (UPN)
|
|
|
|
user: "incoming@ad-domain.example.com"
|
|
|
|
# Email account password
|
|
|
|
password: "[REDACTED]"
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# IMAP server host
|
|
|
|
host: "exchange.example.com"
|
|
|
|
# IMAP server port
|
|
|
|
port: 993
|
|
|
|
# Whether the IMAP server uses SSL
|
|
|
|
ssl: true
|
|
|
|
# Whether the IMAP server uses StartTLS
|
|
|
|
start_tls: false
|
2018-03-02 11:32:39 +00:00
|
|
|
|
2019-02-21 04:02:10 +00:00
|
|
|
# The mailbox where incoming mail will end up. Usually "inbox".
|
|
|
|
mailbox: "inbox"
|
|
|
|
# The IDLE command timeout.
|
|
|
|
idle_timeout: 60
|
|
|
|
```
|