How do I send emails outside my domain with Exchange 2007 and c#
I am able to send emails using the typical C# SMTP code across Exchange 2007 as long as both the from and to addresses are within my domain. As soon as I try to send emails outside the domain I get: Exception Details: System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: 5.7.1 Unable to relay How can I get exchange to accept my email and send it out to the internet? Try #2... How about using a Exchange Pickup Folder instead? They are a faster way to send emails through Exchange because it just creates the email and drops it in the folder, no waiting to