We have several applications that will send email to an SMTP relay, this relay then sends to the Internet.
To test applications that use this functionality, we have been advised to use Outlook Express on the servers that will have the applications installed.
Therefore, the connection will be Outlook Express > SMTP relay > Internet
Apparently this is because Outlook Express will send the FQDN of the server properly in the EHLO/HELO greeting to the SMTP relay.
However, I am wondering where we set the POP username/ password? Will this be set on the SMTP relay server? Can this be set to anonymous?