I'm interested in creating aliases to use on my
board, so I can use them rather than full addresses
of those I email through the bbs.

My understanding was that one do something like

myalias myemail@mydomain.com

in the alias.cfg file

I've done this, and restarted the mail server. But get
error messages when I try to send to myalias@toolazy.ddns.net

Are there other options I have to turn on ?

I have enabled "Receive by Sysop Aliases" .

I get unknown user if I try to email to the aliases on
the bbs via netmail/internet, or through proton mail.

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