[Users] What happens ...

[Michael]

> Yes, POP3 listens on port 110 while SMTP listens on port 25 (usually).
> Exim provides SMTP as it is an MTA, POP3 will be provided by another
> application.

But, wouldn't it be also logical if POP was just the same MTA working kind of into the other direction ? Or in other words, if POP is not done by the MTA then how it this server called ?
Sorry for adding more confusion...