Mailing List Archive

[Bug 2402] IPv6 verify
https://bugs.exim.org/show_bug.cgi?id=2402

--- Comment #1 from Jeremy Harris <jgh146exb@wizmail.org> ---
Could you try having exim do the ipv6 lookups, using
"exim -be '${lookup dnsdb ...}'"

Also, can you get a debug output?

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[Bug 2402] IPv6 verify [ In reply to ]
https://bugs.exim.org/show_bug.cgi?id=2402

--- Comment #2 from Bjoern Jacke <bjoern@j3e.de> ---
I found the reason for this helo validation failure. I added a while ago this
line:

dns_ipv4_lookup = *.freenet.de

to the exim.conf because there was a issue with the remote MTAs of that
provider making forward-confirmed reverse DNS checks which failed with the
IPv6 addresses that where used by exim from our site.

While for outgoing mail dns_ipv4_lookup can be helpful I think for helo
verification dns_ipv4_lookup needs to be ignored because we are not able to
influence if a certain remote site uses v6 or v4 to deliver mail to us.

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