We are having a problem sending to one company. We are getting the following error back.
firstname.lastname@example.org on 11/29/2006 1:59 PM
The format of the e-mail address is incorrect. Check the address, look up the recipient in the Address Book, or contact the recipient directly to find out the correct address.
< outgoing1.broadwing.net #5.1.3 SMTP; 553 Dynamic pool 184.108.40.206. <http://unblock.secureserver.net/?ip=65.90.208.*
This is not happening with other outgoing mail.