Thanks for the pointer towards the SpamAssassin headers. After looking at them more closely, I realized that the problem was in the Content Preview section. Specifically, in my case, the email I was attempting to send contained a "’" character as part of the word "can’t", which was copied into the SpamAssassin Content Preview without being escaped.
As I have no purpose for the Content Preview, the solution for me was to modify the SpamAssassin template to remove that section. There is some information about how to do that at https://mediatemple.net/community/ products/dv/204644360/how-do-i-change-the-spamassassin-template-for-messages- recognized-as-spam[1] -- Soren Stoutner 623-262-6169 so...@stoutner.com -------- [1] https://mediatemple.net/community/products/dv/204644360/how-do-i-change-the-spamassassin-template-for-messages-recognized-as-spam
