I added an additional email address to a user in AD on an Exchange 2003 server. Things went smoothly for a while, then the email (to gmail.com) stop arriving at the Google destination. I've received delivery receipts which stated that the email was delivered and it appears sent. But it never shows up in the person's google inbox. I can successfully send an email from our email server, directly to the recip @ gmail.com, but when that address is used in Exchange AD as a secondary email addy, it only arrives in our internal email and never makes it out to Gmail. No error messages, no failed delivery notifications. But it just doesn't seem to want to share addys in this persons account. I have my own email server, a DNS host and an ISP. As stated, it worked at one time for me. I can successfully send email to this firstname.lastname@example.org if I enter the addy manually. But the email never shows up in their external (gmail.com) only in our internal email. Any theories? Any suggestions?