Hi all Message Labs definitely don't like that character I'm afraid. I had to change it for someone at an old company. When they sent out to certain external clients, if they were using Message Labs the message would be rejected. As soon as I removed the character all was fine. Regards, Paul Lemonidis. ----- Original Message ----- From: Michael B. Smith To: [ExchangeList] Sent: Thursday, November 03, 2005 12:59 PM Subject: [exchangelist] RE: Invalid SMTP address characters http://www.MSExchange.org/ I would be interested in seeing the bounce. RFC-2822 says that character is OK. That doesn't mean all mail systems along a path would. ------------------------------------------------------------------------------ From: Chris Wall [mailto:Chris.Wall@xxxxxxxxxxxxxxxxxxx] Sent: Wednesday, November 02, 2005 10:01 AM To: [ExchangeList] Subject: [exchangelist] Invalid SMTP address characters http://www.MSExchange.org/ Hello all, Running Exchange 2003 Pre SP1. I have several users that have (for years) had an apostrophe in their primary SMTP address, and they have had no problems. An Example would be Chris.D'Wall@xxxxxxxxxxxxxxxxxxxx Notice the ' in the example. All of a sudden, 5 days ago, all users with apostrophes in their SMTP address have been unable to send external or receive external e-mails. To fix the issue I have had to set their primary SMTP address to not include the Apostrophe. Using the example above, the new primary would be Chris.DWall@xxxxxxxxxxxxxxxxxxxx This would allow mail to flow from and to the users. Now the weird part - if I leave the Chris.D'Wall@xxxxxxxxxxxxxxxxxxx address as an alias - external senders can now deliver mail to either address. Any ideas on this one? Thanks Chris ------------------------------------------------------ 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: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ 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: paul_lemonidis@xxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx