I've been wrestling with this situation for several days. I have an Att "sbcglobal.net" primary e-mail with several subaccounts. Have used ATT server recommendations "inbound.att.net 995 SSL" & "outbound.att.net 465 SSL" which test complete for inbound server and sent.I can also use "pop.att.yahoo.com & smtp.att.yahoo.com" which also work. All messages I compose and send show in the sent folder but remain in the outbox folder and are never received by the addresses I have sent to? i have tried many different things (repair, new profile, rules, safe mode, disabling my Vipre intenet security program, etc., none of which have been successful. I am reaching the conclusion that the error is in the Microsoft Office Professional Plus 2010 & its Outlook program itself. My previous experience with Outlook 2003 was very good and i liked it very much with all its features. However, the design of Outlook 2010 seems not to be for a simple home user. Rather, it appears to be for large organizatiions with many users working with complex features.
I think that much like many of my associates I will have to consider changing to gmail unless someone can help me out of my current dilemma.
From the Internet postings this problem appears to be inherent to the Outlook program with no apparent fix?