On Sat, 5 Nov 2005 16:36:56 -0800, Sherry Beauchamp <[log in to unmask]> wrote: >"550 Rule 11 imposed mailbox access for xxxxx@xxxxxxxxxxx refused" > >Does this mean they're gone, their mailbox is full, or they're >blocking our mail? It's hard to say exactly, but I would interpret this to be similar to what users in AOL.com (and other providers also) can do, namely, block incoming mail from a specified list of addresses. So, if your From: address is not on the block list, then your mail will be received. If your From: address is on the block list, then your mail will be rejected. The 550 means "no such user", otherwise known as a permanent bad address error.