New Message: 501 Syntax error - Badly formatted address

[webmaster at userland.com]

A new message was posted:

Address: http://manila.userland.com/discuss/msgReader$1076

By: a (alcodean at hotmail.com)

Setting up the server and i always get this error on creation of new accounts/Member signup form.

501 Syntax error - Badly formatted address

SMTP address confirmed and email account/address is a real account and correct.

This is a Manila site.. http://manila.userland.com/.