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SMTP authentication on Postfix/Dovecot on CentOS

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Operating Systems Linux Red Hat SMTP authentication on Postfix/Dovecot on CentOS
# 1  
Old 05-21-2010
SMTP authentication on Postfix/Dovecot on CentOS
Hi,

I did setup one E-mail Server with postfix/dovecot/squirrelmail on CentOS 5.x and is working fine.

I did configure SMTP authentication (without TSL/SSL) so that users from outside can send emails via our email server with SMTP auth. One weird issue i'm getting is that it's working from thunderbird 3.x but NOT from Outlook 2003.

If add IP of outsider as "mynetworks" then it works on outlook also but this is not the solution.

Please help!
TIA
Prvn

---------- Post updated at 06:59 PM ---------- Previous update was at 11:53 AM ----------

Also, It's working with Outlook 2007 and 2010 (apart from thunderbird) but does NOT work with Outlook 2003/2000. Any help?
# 2  
Old 05-25-2010
Reportedly, earlier versions of Outlook present substantially different Message-ID headers. If you do a web search on the issue you will find plenty of information.
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