I don't seem to be able to send out ANY emails now. It started with me trying to send a message and I would get the error (that I will send you & include in this query) once and then try sending again and it worked. Then, it deteriorated and after 3 consecutive attempts to send out an email it would successfully be sent. Now, it seems that every time I try to send an email out, I get the same old error and it won't send no matter how many attempts I try. Here is the full version of the error message: Alert, An error occurred while sending mail. The mail server responded: 5.1.1 <[email protected]> recipient rejected. Please check the message recipient "[email protected]" and try again. I am currently running version 55.0b2 (64-bit) on a Mac Book Pro. Any help would be greatly appreciated. Thank-you for your valuable time. Sincerely, David