I am configuring Exchange 2010 "remote" features. Exchange is published through TMG. The security certificate is locally issued.
Locally, Outlook and OWA work quite fine. Remotely (over WAN), OWA works fine. ActiveSync, however, has a problem; inbound emails make it safe and sound to the smartphones. However, emails sent from smartphones never leave their Outbox!
On TMG, the listener to publish OWA is the same for AS. The rules are almost identical too. AS rule is a copy/paste of OWA rule, with the paths being modified to match destination virtual folders.
What is missing in here so that emails are not being sent from smartphones, regardless of model!