Daniel Taylor wrote:
Eh, there's one in every crowd.
s/one/at least one/ :-)
the mere thought of changing e-mail to be less permissive than
STD821/822 makes his skin crawl for less rational reasons.
SPF is more permissive than RFC 821: SPF allows to "aggregate"
unrelated sending MTAs in one "permission" (SPF record). A more
restrictive approach is BATV, and combining BATV with SPF can
make sense for folks who don't need the "aggregation" feature.
IOW if you ever thought about SPF's include:-mechanism then BATV
likely isn't something for you.
Frank
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