Dnia 25.04.2024 o godz. 14:59:35 Andrew C Aitchison via mailop pisze: > Should someone here not know, RFC 7505 > A "Null MX" No Service Resource Record for Domains That Accept No Mail > is the accepted standard way to signal a domain that does not receive email. > > By using the MX records suggested there, a recipient would know > that the sender acknowledges sending mail from that domain.
The same RFC says in section 4.2, "Sending Mail from Domains That Publish Null MX": Null MX is primarily intended for domains that do not send or receive any mail, but have mail sent to them anyway due to mistakes or malice. Many receiving systems reject mail that has an invalid return address. Return addresses are needed to allow the sender to handle message delivery errors. An invalid return address often signals that the message is spam. Hence, mail systems SHOULD NOT publish a null MX record for domains that they use in RFC5321.MailFrom or RFC5322.From addresses. If a system nonetheless does so, it risks having its mail rejected. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub." _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
