Hey JcW32, that makes perfect sense, both Cybermesa and Runbox use standard POP3 and SMTP authentication, so Outlook just needs to know to use the same login details for both sending and receiving.
In Outlook 2024, that setting is tucked away a bit. When you’re adding the account manually, click More Settings, then go to the Outgoing Server tab.
You’ll see an option that says My outgoing server (SMTP) requires authentication, make sure that’s checked, and then select Use same settings as my incoming mail server.
That tells Outlook to use your Runbox username and password for sending as well.
After you save that and test the connection, it should pass both checks. Just to confirm, are you creating your accounts through the Control Panel then click Mail then Profiles route I mentioned earlier, or from inside Outlook itself?
That’ll help me guide you to the exact screen layout for your version.
Regards,
Aron