Change SMTP setting including port but still getting errors sending to port 25

I was getting errors sending email alerts saying that Voyager could not find the email server on port 25. I switched to a new SMTP server. Setup the email option in FTP Voyager to use Port 587 and the new SMTP server settings.   Stopped and restarted the Scheduler service. But still getting error that it cannot send on port 25.

Thanks

Bob