mh-junk-function-alist

mh-junk-function-alist is a variable defined in `mh-e.el'.
Its value is

((spamassassin mh-spamassassin-blacklist mh-spamassassin-whitelist)
 (bogofilter mh-bogofilter-blacklist mh-bogofilter-whitelist)
 (spamprobe mh-spamprobe-blacklist mh-spamprobe-whitelist))

Documentation:
Available choices of spam programs to use.

This is an alist. For each element there are functions that
blacklist a message as spam and whitelist a message incorrectly
classified as spam.