Regarding your answer to the question about sending mail through a real estate application's pop3 client: the suggestion did not work.
I entered the host IP address of the PC where the real estate application resides in the "Allow messages only from the following external internet hosts to be sent to external internet domains:" field as suggested. And, as the field-level help indicated, I enclosed the IP address in square brackets. I even tried using a wildcard to cover all of the hosts on my private subnet. But, I still got the same 554 - relay rejected message.
I have gotten around this by turning on smtp on another Notes server in my domain (not my mail server)and configuring the real estate application to send mail to the other notes server. This other notes server does not have the inbound relay restrictions turned on -- but, it is also not accessible via the outside internet. So, the application sends the mail to the other notes server which then routes it to my mail server which is connected to the internet and the mail is sent out.
Still, I would rather not use the workaround that I have implemented. Do you have any other suggestions on how to get this to work? Am I configuring the SMTP inbound controls correctly? Have you ever witnessed this working as advertised?
Relay controls do work. You need the notes.ini entry SMTPAllHostsExternal=1 as well as the controls. This ini setting requires a reboot to take effect. Also, did you stop and start SMTP and the router when you made the changes? That is a requirement. You should have your IP address in the allowed to send to field, you should also put the e-mail address you are using to send in the Outbound sender controls for allowed Internet senders.
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