I've corresponded about this with Charles Orth ([log in to unmask]), who is involved in maintaining the mcimail gateway, and, yes, it is definitely mcimail's problem. Associated with this is the fact that if one of your mci subscribers cancels his/her account, mail to all your mci subscribers will bounce until you delete the non-existent user. I suggest writing to Charles if you want more definitive info. He has been straightforward in acknowledging both the problem and his lack of resources to deal with it. -- Phil Sollins