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How to solve Zimbra error "message does not meet IPv6 sending guidelines regarding PTR"

How to solve Zimbra error "message does not meet IPv6 sending guidelines regarding PTR"

March 7, 2024
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As we are using MTA hence i have logged in to MTA server and checked postfix inet protocol and found it was enabled for all

Log into your server SSH and run the following commands:

root@mta:/etc/postfix# postconf inet_protocols
inet_protocols = all
root@mta:/etc/postfix# postconf inet_protocols=ipv4
root@mta:/etc/postfix# postconf inet_protocols
inet_protocols = ipv4
root@mta:/etc/postfix# service postfix restart
root@mta:/etc/postfix# 

Thank you!

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