On Wed, 24 May 2023, Sander Smeenk via Exim-users wrote:
Hi!

Indeed it seems to be related to CNAME chains like in your situation and
the ones discussed before this.
Same here:

$ exim -bt i...@email.postcodeloterij.nl
i...@postcodeloterij.slgnt.eu
    <-- i...@email.postcodeloterij.nl
  router = dns_lookup, transport = remote_smtp
  host mx1.slgnt.eu [194.213.114.251] MX=10

$ host -t MX email.postcodeloterij.nl
email.postcodeloterij.nl is an alias for postcodeloterij.slgnt.eu.
postcodeloterij.slgnt.eu is an alias for postcodeloterij.slgnt.eu.cdn.cloudflare.net. postcodeloterij.slgnt.eu.cdn.cloudflare.net mail is handled by 10 mx1.slgnt.eu.
And addressed to the first CNAME:

$ exim -bt i...@postcodeloterij.slgnt.eu
i...@postcodeloterij.slgnt.eu
  router = dns_lookup, transport = remote_smtp
  host mx1.slgnt.eu [194.213.114.251] MX=10

ciao
 Markus
--
/ Markus Reschke              \
\ madi...@theca-tabellaria.de /


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