Hello,
I have configured Outlook 2013 to use SMTP auth by username in UPN format, but it keeps sending local part of username to the server:
postfix/smtpd[27896]: A404B101AFA: client=server.domain.com[1.2.3.4], sasl_method=DIGEST-MD5, sasl_username=testuser
Tried the same with Thunderbird client - it worked properly:
postfix/smtpd[25408]: 317F1101AFA: client=server.domain.com[1.2.3.4], sasl_method=CRAM-MD5, sasl_username=testuser@domain.tld
Could you tell my what is the reason of such Outlook behavior?
Regards,
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Alex