On 09/07/2020 16:06, Matthew Richardson wrote:
On a related issues there were (perhaps long ago) issues if the A record for a domain had an SMTP server on it, where email could sometimes be delivered to that A record rather than the MX. I had (again long ago: 10-15 years) actually seen this occur.
Note that *delivery* will only happen if that A record were actually listening on tcp/25 and accepting SMTP connections. No-one should be opening up the SMTP port on a server meant to serve only HTTP(S) traffic. Anyone who does that deserves what they get for making such poor decisions.
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