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Allows users to authenticate using their Mailcow credentials


The following placeholders will be used:

  • is the FQDN of the authentik install.
  • is the FQDN of the mailcow install.


  1. Log into mailcow as an admin and navigate to the OAuth2 Apps settings

OAuth2 Apps menu

  1. Click "Add OAuth2 Client"

  2. Insert the redirect URL:

Add OAuth2 CLient

  1. Copy the Client ID and Client secret and save it for later

ClientID and Secret


  1. Under Directory -> Federation & Social login Click Create > Mailcow OAuth Source

Mailcow OAuth Source

  1. Name: Choose a name (For the example I used Mailcow)
  2. Slug: mailcow (You can choose a different slug, if you do you will need to update the Mailcow redirect URL and point it to the correct slug.)
  3. Consumer Key: Client ID from step 4
  4. Consumer Secret: Client Secret from step 4
  5. Authorization URL:
  6. Access token URL:
  7. Profile URL:

Here is an example of a complete authentik Mailcow OAuth Source

Save, and you now have Mailcow as a source.


For more details on how-to have the new source display on the Login Page see here.