Description

SASLAUTHD_MECHANISMS only has test coverage for ldap and rimap, which were discussed during the original implementation of the feature.

The other mechanisms were added for the sake of it, but likely don't make much sense with DMS.

• Potentially pam would as it appears to be the way to leverage databases like mysql for authentication.
• mysql has not been a valid value for well over a decade. It's likely never worked in DMS.

Generally SASLAUTHD related support is not necessary for users. It was contributed as an alternative SASL auth method for Postfix to use when DMS has Dovecot disabled that would normally be delegated for SASL authentication.

Users interested in MySQL or similar DB access could configure for such directly with Postfix and Dovecot (or just Dovecot due to existing SASL auth config).

There may be potential breakage with SMTP_ONLY=1 users. I've not considered this as our support/docs for such are lacking. As this is for a breaking release, it should be fine and we can easily bring these back should users raise issues about it.

Docs wise, I don't see how the note about multiple values for mechanisms being supported was valid. Perhaps it was for direct usage of the command but not with how we start the supervisord services.

Fixes #4251

UPDATE: I forgot to remove these values from our reference ENV file, mailserver.env. This has been spotted and contributed: #4472

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change that does improve existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md or the documentation under docs/)
• New and existing unit tests pass locally with my changes
• I have added information about changes made in this PR to CHANGELOG.md