I'd say that SPAM filtering causes more lost mail: silently discarded, placed in the SPAM folder never to be seen again, than trouble with SPF. The difference being the results of an SPF check failure is returned to you and is thus visible, false positives 'magically' disappear - no problem at all there then ;-)
-- Regards, Martin Nicholas. E-mail: [email protected] -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
