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List:       postfix-users
Subject:    Re: No AUTH PLAIN in smtp
From:       Wietse Venema <wietse () porcupine ! org>
Date:       2019-02-28 12:21:54
Message-ID: 449BW64Vl0zJrNs () spike ! porcupine ! org
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Orm Finnendahl:
> Hi,
> 
> after upgrading my system, sending mails with postfix to a relayhost using dovecot \
> for STARTTLS fails (it used to be working for years without problems before).  
> The logs of the relayhost show that a TLS connection gets established and the \
> (debian postfix) relay server then offers "250-AUTH PLAIN CRAM-MD5 NTLM" and \
> "250-AUTH=PLAIN CRAM-MD5 NTLM". My client then issues "AUTH NTLM..." rather than \
> using PLAIN which ultimately fails on the server. 
> Is there any way to force using the AUTH PLAIN method from the client's side?
> 
> I'm using postfix 3.3.3, authentification uses dovecot v2.3.4.1

http://www.postfix.org/postconf.5.html#smtp_sasl_mechanism_filter

	Wietse


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