If you are using Ubuntu, you can find similar guidance here: How to Block Access Based on GeoIP on Ubuntu.
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How to Block Access Based on GeoIP on Ubuntu
I usually use this method to block access to my Zimbra server from international IP/outside. Only IP based on my
Continue readingZimbra Tips : How To Block Email From and Return-Path did not Match
Recently, my client got spam e-mail originating from their domain. Although, I have improved by implementing the sasl / sender
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