New answers tagged pop3
SMTP mail is never copied to a Sent folder automatically. The Sent folder is an IMAP folder and has nothing to do with SMTP. The mail client might save a copy using IMAP, but never the SMTP server.
By definition of the SMTP RFC all this server does is relay mail. SMTP does not save copies to a sent folder. That's all dependent on the client mail readers.
This behaviour depends on the mail client, not the server itself. There should be an option in your mail client to put a copy of sent e-mails in the "Sent" folder.
There is no built-in mail server in Windows. Use Microsoft Exchange, or some other third party mail server that supports Windows.
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