Werk #9583: Fix missing SASL mechanism filter for PLAIN mail authentication
| Component | Firmware |
| Title | Fix missing SASL mechanism filter for PLAIN mail authentication |
| Date | Aug 17, 2026 |
| Level | Trivial Change |
| Class | Bug Fix |
| Compatibility | Incompatible - Manual interaction might be required |
| Appliance Version | 1.7.23 Not yet released |
Before this werk, configuring outgoing mail authentication with the "PLAIN" method did not add a smtp_sasl_mechanism_filter to the Postfix configuration, even though the user explicitly selected this method. Only the "LOGIN" method was correctly written to the configuration.
This werk fixes the "PLAIN" method to also write smtp_sasl_mechanism_filter = plain, matching the explicitly selected authentication method. Systems relying on the previous negotiated behavior when "PLAIN" was selected will now have the mechanism explicitly forced to "plain".