I am not able to get postfix to authenticate on port 465 or 587 to allow account holders to relay via this server.
Everything else works. That is, we can use the account name and password to log into Cyrus IMAP, though I know it
isn't postfix that makes that connection, it does mean that SASL is working and accepts the mail account creds used
in all the tests in the attachment.
Thunderbird is set up to user SSL/TLS with normal password on port 465 for outgoing email.
It looks to me like postfix is not getting a positive response from SASL, so I expect something is not configured correctly. I've spent the last two days trying to find the issue and have run out of ideas. Any help would be appreciated.