On 17 Jun 2020, at 15:15, vom513 via mailop wrote:
My understanding for the longest time is that an SPF policy of “-all” is a strong statement and should be honored as such.
A lot of people believed that a long time ago. However, those of us running systems that handle a substantial quantity of non-bulk B2B email quickly learned that Sturgeon's Law applies to the set of all email and DNS admins, and therefore "-all" defaults in SPF records are often an expression of ignorance rather than one of hostility to transparent forwarding or a description of reality.
This problem is part of why DMARC was developed. Very few people are adequately confident of their understanding of DMARC and of its reliability to make it the root cause of mail rejections that they do not intend.
-- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Not For Hire (currently) _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
