On Mon, 11 Jul 2016 12:49:04 -0400 Robert Fitzpatrick wrote: > I finally was able to get SPF checks to be more reliable by making > sure Postfix SPF policies were in place. Here is a good read .... > > https://github.com/mail-in-a-box/mailinabox/issues/698 > Excerpt: It's worth noting that lack of postfix's spf checker renders > spamassassin's flagging impaired because without it spamassassin in > my case is only adding helo_pass and that's all regarding spfs.
It sounds like SA is not able to parse the envelope sender out of the headers. See the description for envelope_sender_header in man Mail::SpamAssassin::Conf
