When using the pop delivery agent, actual delivery is via the spop(8) program, which provides a way to perform local delivery for any user that does not have a local Unix account. This is handy in a POP universe where it is often undesirable for thousands of POP clients to also have local accounts. It is also useful at sites where security concerns prevent POP-only users from also having Unix accounts.

Support is included in your mc configuration file like this:

MAILER(`local') define this
MAILER(`pop')   before this

Note that the local delivery agent must be defined before you can define pop.

The defaults for the pop delivery agent are shown in Table 20-11, along with the mc configuration macros used to alter those defaults.

The spop program is distributed as part of the mh suite of software, and is available from http://www.ics.uci.edu/~mh/.