Ever since updating to version 14.3.8 I am unable to send attachments as .eml files. Normally I would compose a new message and drag the email I wanted to attach to the compose window to attach it. This still works and I can write my email, but after I send it I get a bounceback saying "554 5.6.0 Invalid message content (in reply to end of DATA command)". All other emails/attachments work fine, and sending eml attachments through our web interface works fine as well. Is there anything I can look at to stop this from happening through Outlook?