1.  In src/Makefile, add pop to SUBDIR, so it looks something like:

    SUBDIR= tools uip submit deliver local phone pobox bboards pop smtp uucp


2.  In mmdftailor, add these lines

MTBL	pop, file="pop", show="POP service"
MDMN	POP, show="POP Psuedo-domain", table="POP"
MCHN	pop, show="POP Delivery", que=pop, tbl=pop,
	pgm=pop, mod=reg, ap=822, host="pop"


3.   Create the table for the POP channel, one line:
	pop:		pop

4.    Run dbmbuild

5.    In your mmdf.start file, either add the pop channel to an
      existing background deliver, or give it one of its own:

	deliver -b -cpop &