Wietse Venema via Postfix-users:
> 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: [email protected]
> > 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.
My example was based on the logging your earlier message. You'
need to add something like 2603:1056:c03:1c16:/64":
main.cf:
debug_peer_list = 143.198.0.0/16, 2603:1056:c03:1c16::/64
debug_peer_level = 1
Alternatively you could temporarily increase the logging level for
all submission clients in master.cf with:
master.cf:
submission ..... smtpd
# Execute "postfix reload" after changing master.cf.
-o debug_peer_list=static:all
-o debug_peer_level=1
...other -o overrides...
But that would log everyone's password.
Wietse
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