We are looking for a relatively simple mail server. We have two requirements:
- Incoming mail can be piped to an arbitrary executable (binary or script)
- Users with valid passwords can easily use the server as an outbound relay.
- (Preferable) Easy configuration.
We use Postfix on most of our servers, but it seems to be more difficult to configure than necessary. (This is not a question about Postfix, but usually the main issue we have is being able to use #1 or #2, but not both.)
Any suggestions for which mail server fits these requirements?
Our focus is web development, not email hosting, so we don't want to spend too much time on email administration.
We are running Ubuntu 12.04 Server, so something that installs from apt would be nice.