Last week (7/28) we applied a hub transport rule that appends a legal disclaimer to all emails that go outside our domain. Since then, at least 2 of our users have started having issues with our email faxing (Concord Fax). Currently the users open a .pdf in Acrobat, then choose File-Send Email. According to Concord, those emails have a small empty email attached to them. I can't see it if my users sends to my gmail, however it is keeping our faxes from going through. If I disable the hub transport rule, the faxes go through just fine. How do I stop it from adding the empty email as an attachment?