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I setup a simple new virtual-server yesterday, initially outgoing mail was rejected at SMTP-time by Gmail with an error referring to reverse-DNS for the IPv6 ad
by stevekemp 7y ago
I setup a simple new virtual-server yesterday, initially outgoing mail was rejected at SMTP-time by Gmail with an error referring to reverse-DNS for the IPv6 address.
Fixing a couple of things like that (add/update a SPF record, setup reverse DNS for IPv4 & IPv6) and mail was successfully delivered to gmail.
Biggest pain there is that some virtual-machine providers don't let you change RDNS for IPv6 addresses (e.g. scaleway). So you get the choice of disabling it, or changing provider.