How To Increase SMTP Debug Logging - MTA

How To Increase SMTP Debug Logging - MTA

   KB 21884        Last updated on 06/20/2016  

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How To Increase SMTP Debug Logging - MTA


You can obtain this by modifying the which is located at /opt/zimbra/postfix/conf . Go to the smtpd line and at the end of the line add -vv

 smtp      inet  n       -       n       -       -       smtpd -vv

restart the mta by running the following

 zmmtactl restart

Logging goes to /var/log/zimbra.log

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Verified Against: Zimbra Collaboration 8.6, 8.5, 8.0 Date Created: 04/26/2015
Article ID: Date Modified: 06/20/2016

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Wiki/KB reviewed by SME1 SME2 Copyeditor Last edit by Jorge de la Cruz
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