Gmail ipv6 no PTR record rejected emails.

If You get the following message on the ISPconfig server running postfix:

„Our system has detected that this message does 550-5.7.1 not meet IPv6 sending guidelines regarding PTR records”

Then i suggest following work-around: Go to /etc/postfix/ find line:

smtp unix – – – – – smtp and change it to:

smtp unix – – – – – smtp -o inet_protocols=ipv4

Thats all folks 🙂

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