- Plesk for Linux
Limitations on outgoing email messages are enabled on the server but don't work for Outlook. It is configured for outgoing email authentication with user name in UPN format (firstname.lastname@example.org)
Outlook keeps sending local part of user name instead of a user name in UPN format:
CONFIG_TEXT: csp12 postfix/smtpd: 97D2D101AFA: client=servername.domain.tld[184.108.40.206], sasl_method=DIGEST-MD5, sasl_username=user
The issue is specific to Outlook. Please contact Microsoft regarding this issue.
Please contact Microsoft regarding this issue.
Note: in case of using Outlook 2007, check the following article .