IMH_ED_SPAM is peculiar to InMotion Hosting.
It causes a lot of false positives for me too.
Their support advised:
"IMH_ED_SPAM is a InMotion Hosting rule that matches known spammy keywords
and assigns a spam score to them. The phrases in the list are common spam
phrases that are likely to be blocked in other places. I would do a google
search for common spam phrases and make sure that your newsletter doesn't
contain any. I hope this information is helpful."
--
Sent from: http://spamassassin.1065346.n5.nabble.com/SpamAssassin-Users-f3.html
It causes a lot of false positives for me too.
Their support advised:
"IMH_ED_SPAM is a InMotion Hosting rule that matches known spammy keywords
and assigns a spam score to them. The phrases in the list are common spam
phrases that are likely to be blocked in other places. I would do a google
search for common spam phrases and make sure that your newsletter doesn't
contain any. I hope this information is helpful."
--
Sent from: http://spamassassin.1065346.n5.nabble.com/SpamAssassin-Users-f3.html