On 23/05/2023 13:21, Sander Smeenk via Exim-users wrote:
> I try to send a message to 'info@???', but Exim
> unexpectedly changes that to 'info@???', based on
> some DNS queries it seems?
> | $ exim -f ssmeenk@??? -bt info@???
> | info@???
I'm definitely not an expert, but is this not expected behaviour based on
RFC5321 section 5.1 [1]?
"The lookup first attempts to locate an MX record associated with the
name. If a CNAME record is found, the resulting name is processed as
if it were the initial name."
> And why does it stop there instead of following the next CNAME chain to
> postcodeloterij.slgnt.eu.cdn.cloudflare.net?
I don't know the answer to this, but perhaps it's also defined behaviour in an
RFC somewhere? (or out of spec => undefined?)
Tim
[1]
https://www.rfc-editor.org/rfc/rfc5321#section-5.1
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