In article <20210130212339.447316d04...@ary.qy> you write: >In article <cf0b307a-c83a-4ff9-bc03-9de28362d...@bluepopcorn.net> you write: >>The issue isn’t the existing use of HELO names, it’s how they could >>be (mis-)used. The fact that a message sender can put anything there >>makes HELO basically meaningless. > >This is DMARC -- the HELO domain has to match the header From: and there >has to be an SPF record that validates it. > >The most plausible case is that it's a bounce messsage > > From: mailer-dae...@mta27.foo.bar.example.com > >the MAIL FROM is null, HELO is mta27.foo.bar.example.com, and the SPF >record for mta27.foo.bar.com says that IP is OK.
I wish I could type: ... for mta27.foo.bar.example.com says that the IP is OK. >I don't feel strongly about whether to use the HELO name but it doesn't break >anything. R's, John _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
