Well, it appears to be just one specific email that won't go through. Have tried several times with no success. Others come through OK. Strange.
all from the same address? (ie a given address might be on a spam/blocked list, have excced it's "sends per hour" limit. other limiters could be keywords in subject, attachment size, links?
Thanks for the suggestions. This is a pretty simple text email with no attachments. I have received other emails from her so she doesn't appear to be on a blocked list.Edit -> Spelling