On 31/07/2024 23:34, Wietse Venema via Postfix-users wrote:
I came across something that I have not seen before: a domain (call it
example.com) that has no email addresses. No one sends or receives email
for that domain.
If there is no email from sen...@example.com, the domain should say
so in SPF, DKIM, DMARC, and so on. Cloudflare has a webpage on how
to protect domains that do not send email.
Thanks Wietse I saw that
My doubt is that since the outgoing email server identifies itself as
host1.example.com in the EHLO, is there a requirement or even an
expectation that postmas...@example.com will be able to receive email.
Presumably those other domains list host1.example.com as an authorized
sender. Is that enough? If you're concnerned that the messages would
be flagged as suspicious, then RFC's aren't the whole story.
Wietse
Yes, exactly my doubt, more about pratice than standards I guess.
Thanks
John
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