Noob question, what exactly is SMTP and what's it used for?
It stands for "Simple Mail Transfer Protocol". Its the protocol that sends your (Internet) e-mail replies to where they need to go. So when you click that "send" button on an e-mail, your e-mail client ultimately connects to a SMTP server and sends your message. The SMTP server then does what it needs to do with it to make it get to where it needs to go.
Just like SMTP is for sending, POP3 or IMAP are the popular protocols for retrieving your e-mail. IMAP is the better of the two, but POP3 is the older and most widely supported...
When your e-mail client or phone is "checking for new mail", what its really doing is talking to either an IMAP or POP3 server and saying "Hey I am so and so and I can prove it... now show me my mailbox!".
Now if you're asking in the context of Mystic itself let me know. Mystic does have these things, but I use them in a different way which I will gladly explain.
My philosophy is: "How can I leverage the Internet to make the BBS experience better to the SysOp and BBS User" as opposed to: "How can I use the Internet/ web to replace the BBS experience"...
And I will elaborate on that if you'd like.
--- Mystic BBS v1.12 A40 2018/04/28 (Windows/32)
* Origin: Sector 7 [Mystic BBS WHQ] (21:1/108)