I have two websites setup in web station in containers, and the websites run as expected. Each website has a contact form to send an email to contact me (or my wife). Problem is that the form says it sent the email, but the email is never received, or I get a message saying the email cannot be sent.

I have the settings in DSM setup so I receive emails for system status changes without any issue.

I new to the synology environment, so the question is how do I setup or configure things so the website(s) can send mail?

I do not want to setup a mail server on my NAS. I have no need to receive emails to the users of my NAS.