Re: [exim] prefer IPv6 over v4?

On 05/05/2021 00:56, Dan Egli via Exim-users wrote:
> Hey everyone, quick question, more an idle thought. When exim looks up a mail to be delivered via remote_smtp, it seems to always prefer to use IPv4 even when a v6 address is available. For example, in my log I see a message delivered to a gmail address. But both Source and Destination IPs are ipv4 format, even though dig aaaa gmail-smtp-in.l.google.com shows a ipv6 address. Is there some option somewhere that can be set that will tell exim to deliver to IPv6 addresses unless no such address is available, and then fall back to IPv4?

My system were happily using ipv6 for gmail (until I disabled it).

I think you'd need to use exim's debug facilities to see why you're
not getting ipv6 used, assuming you've not deliberately enforced
that in your config.
--
Cheers,
Jeremy