Steven Farrier writes:

There's nothing like an easy question to answer when you get back from the Christmas break - and this is nothing like an easy question?

Let me instead ask you a question:

What software are you already using to deliver email?

Essentially, maildrop (an MDA, message delivery agent) can be used by many, many different MTA (message transport agents) to perform the final stage of message delivery - delivery to a local account.

Of course, maildrop is a rather clever MDA that can actually deliver remotely too, but that isn't important right now.

So what you need is an MTA. Which one depends on your circumstances. You probably already have one, and if so, then that is (probably) the one you should be using. If you have problems with your current MTA (or don't have one at all), then you need to choose one. Fetchmail might be correct - but only in a limited number of circumstances. Exim is certainly a possibility. So is courier (which is written by the same guy that wrote maildrop).

If you're not the system administrator on the box, you should probably chat to them if you can't work out the answer for yourself.