An organization has a POP3 Server mail.company.com Users use Outlook to send and recieve mail and is stored as a .pst file. The company has and office that installed Exchange 2003 SP2. The Exchange Server has an application called POPBeamer on it. The purpose of this is to pull down mail from the POP3 server into Exchange. This works fine. The domain at the office site is office1.company.local Users at this branch site can send email to any user internally (user@company.com), they can send mail to any external mail address (user@hotmail.com). The problem is that the users in the office1.company.local domain can't send mail to users who reside on the POP3 server at address (user@company.com). They get an error 5.1.1 (The user does not exist or doesn't have a valid mailbox. This is true, the user does not have a mailbox in Exchange but his address user@company.com is a valid POP3 email address. The Exchange Recipient Policy on the Exchange Server looks like this; SMTP ----- @company.com SMTP------ @company.local
On Sun, 9 Mar 2008 15:46:01 -0700, PCMANTT wrote: > An organization has a POP3 Server mail.company.com Users use Outlook to send > and recieve mail and is stored as a .pst file. The company has and office > that installed Exchange 2003 SP2. The Exchange Server has an application > called POPBeamer on it. The purpose of this is to pull down mail from the > POP3 server into Exchange. This works fine. The domain at the office site is > office1.company.local Users at this branch site can send email to any user > internally (user@company.com), they can send mail to any external mail > address (user@hotmail.com). The problem is that the users in the > office1.company.local domain can't send mail to users who reside on the POP3 > server at address (user@company.com). They get an error 5.1.1 (The user does > not exist or doesn't have a valid mailbox. This is true, the user does not > have a mailbox in Exchange but his address user@company.com is a valid POP3 > email address. > > The Exchange Recipient Policy on the Exchange Server looks like this; > SMTP ----- @company.com > SMTP------ @company.local you need to make sure that the exchange server ist not authoritative for the maildomain @company.com - if it is, the server will never try to send the message outside his own organization. it just looks up the Active Directory, doesn't find the user and replies with NDR 5.1.1 Exchange 2000 / 2003 http://support.microsoft.com/kb/823158 Solution described is probably not perfect, if possible you should make your server authoritative for company.local and company.com should not be authoritative and redirected by an SMTP Connector or sent by your default IMC (if DNS MX available) Exchange 2007 http://msexchangeteam.com/archive/2006/11/16/431531.aspx Same applies here.. Best Regards Christoph
