On Tue, Jan 04, 2022 at 07:20:43PM -0500, Ken Wright wrote:

> My Postfix woes continue.  Now I'm getting this error message:
> 
> Jan  4 19:08:47 grace postfix/smtps/smtpd[17286]: fatal: no SASL
> authentication mechanisms

The selected SASL backend (Cyrus or Dovecot) is not configured to
support any usable SASL mechanisms.

    http://www.postfix.org/DEBUG_README.html#mail

Post (in the body of the message, not a "pastebin") the output of:

    $ postconf -nf

and 

    $ postconf -Mf

Make sure the message exactly preserves the original line breaks
and is not reformatted to add or remove new lines.

With "dovecot" authentication, there should be a socket created by
"dovecot" that allows Postfix to interact with its authentication
service.  Relevant logs from "dovecot" may also be helpful.

-- 
    Viktor.

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