I own 2 domains, moonstoneservices.com and wervus.com. I am attempting to setup tbird on my linux laptop, using wervus.com. I am able to send to my other domain and I can send to my wife at wervus.com. I can receive from gmail and reply with tbird and it works fine. I can send from wervus.com from my droids, phone and tablet, to gmail no problem, using different clients. I can log onto my wervus.com via a cpanel with Firefox and send to gmail no problem. I can go on my droid tablet, turn ON airplane mode, turn ON wifi and use my ISP without my data, 4G ISP in play, use another client, K9, and it works fine. ALL attempts to send are showing up on the mail server in the SENT folder. There is nothing in gmail trash or spam from this domain, wervus.com, that i did not put there. This is a new domain which I purchased this week and setup myself. This appears to be a Thunderbird only issue. I could be wrong about that. I have been wrong before. Thank you for your help.