zimbra email security header check

Published: 22 August 2017
on channel: mailserverguru

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In this tutorial, i have shown how to configure zimbra email filtering through postfix header_checks file, postfix is zimbra's MTA at the backend, so we worked with postfix header_checks file, it is always better to filter out unacceptable emails at first stage of email receiving by the server, postfix header checks works at the very beginning of email receiving by zimbra, so most unexpected emails can be Discarded at this stage.

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