I still need a login authentication method, how can I add it in?

[eosps]

I encountered a problem. The openssl 1.1 series is no longer maintained. I tried to recompile postfix and use cyrus sasl 2.1.28. But I encountered a problem. Openssl 3.x abandoned des. But it needs to be referenced in 2.1.28. I used the master version and the problem was solved. It can be compiled successfully. But the login authentication method has been abandoned. My current environment still needs to use the login method for authentication. How should I deal with it?

[mistotebe]

I would say you're out of luck if there's still software that requires the LOGIN mech and doesn't support anything else (e.g. PLAIN). You can try to backport the 2.2 MD5 work or something locally?