giuliano--- via Postfix-users:
> Hi everyone,
> I hope this message finds you well.
>
> I'm having problems with the "new outlook" the default version in
> Windows 11.
>
> When I connect to my account in the "new outlook", the IMAP connection
> works fine, I can see all the e-mails, but when I try to send a new
> e-mail a receive a e-mail with error.
>
> We couldn't deliver your message.
>
> Original message details
> Created date: 10/31/2024 5:53:03 PM
> Sender address: giuli...@hospedaqui.com.br
> Recipient addresses: *********@gmail.com
> Subject: teste
>
> Technical details
> SmtpSubmissionPermanent5XXException: Smtp submission failed. Server
> 'smtp.hospedaqui.com.br' Port '587'. --> Unexpected SMTP server
> response. Expected: 334, actual: 535, whole response: 535 5.7.8 Error:
> authentication failed: Invalid authentication mechanism
And Postfix logging:
> Oct 31 17:54:08 host01 postfix/submission/smtpd[467495]: warning:
> unknown[2603:1056:c03:1c16::5]: SASL LOGIN authentication failed:
> Invalid authentication mechanism
As answered in off-list email, this is an error message from the
Postfix Dovecot SASL client.
You need to turn on one extra level of logging to see which AUTH
mechanism names Dovecot and Postfix expect, and which AUTH mechanism
name the remote SMTP client sends.
main.cf:
debug_peer_list = 143.198.0.0/16
debug_peer_level = 1
IMPORTANT: If you include this logging in follow-up email, be sure
to censor the base64 text in the AUTH command because that may
contain a password.
Wietse
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