Yup Your mail is probably failing the sender verify test. You need to make sure your RDNS is correct or whatever else Verizon want you to set up...ie SPF S ________________________________ From: Conley P. Shairrick [mailto:conleys@xxxxxxxxxxxx] Sent: Friday, September 30, 2005 2:47 PM To: [ExchangeList] Subject: [exchangelist] Routing http://www.MSExchange.org/ We are forwarding a users emails to his Verizon.net account. He can't receive any messages that our Fax Maker server sends. They get cault in our Exchange Queues with a SMTP protocol error occurred. The message shows the fax number, of the sender, followed by @faxmker.com. Verizon says that the message probably fails the sender verify test. We can forward to gmail, yahoo, sbcglobal and hotmail with out any problems. Any ideas? ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: ExchangeMailingList@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx The correct technical term for haggis stalking is "havering".