Quoting John Peach <post...@johnpeach.com>:
No it should not - they know. The RFCs were written way before the
problems we have now. Feel free to update the RFCs if you so wish.
ok,... The problem is however, that it's quite difficult for "normal"
users to find restrictions which are more strict that the default but
still allow receiving mail from (at least currently) unusual
systems/addresses.
e.g. when disallowing non-fqdn sender/recipient addresses postfix
seems also to disallow m...@tld (which might soon become possible with
the "new" tlds)
or some of the restrictions look up A records but the docs don't tell
whether AAAA is also looked up as an alternative (this may become soon
common, too).
Regards,
Philippe
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