[Evolution] pop3 extensions

[Michael Klinosky <mpk2 enter net>]

Hello.
I'm reading that wikipedia link that was just posted (wow - everything
you wanted to know about pop, but were afraid to ask!)

It has this line:
"E-mail clients are commonly categorized as either POP or IMAP clients,
but in both cases the clients also use SMTP. There are extensions to
POP3 that allow some clients to transmit outbound mail via POP3 - these
are known as "XTND XMIT" extensions."

Perhaps these are the "pop3 extensions" that someone just referred to?