-# Legal keywords are
-# poll -- must be followed by a mailserver name
-# skip -- must be followed by a mailserver name
-# protocol (or proto) -- must be followed by a protocol ID
-# port -- must be followed by a TCP/IP port number
-# authenticate (or auth) -- must be followed by an authentication type
-# timeout -- must be followed by a numeric timeout value
-# envelope -- must be followed by an envelope header name
-# aka -- must be followed by one or more server aliases
-# localdomains -- must be followed by one or more domain names
-# interface -- must be followed by device/IP address/mask
-# monitor -- must be followed by IP address
-#
-# username (or user) -- must be followed by a name
-# is -- must be followed by one or more names
-# remotefolder (or remote) -- must be followed by a filename
-# password (or pass) -- must be followed by a password string
-# smtphost (or smtp) -- must be followed by a host name
-# mda -- must be followed by an MDA command string
-# preconnect (or pre) -- must be followed by an initialization command
-#
-# keep
-# flush
-# fetchall
-# rewrite
-# stripcr
-# dns
-# received
-# no keep
-# no flush
-# no fetchall
-# no rewrite
-# no stripcr
-# no dns
-# no received
-# limit -- must be followed by numeric size limit
-# fetchlimit -- must be followed by numeric msg fetch limit
-# batchlimit -- must be followed by numeric SMTP batch limit
-#
-# Legal protocol identifiers are
-# pop2 (or POP2)
-# pop3 (or POP3)
-# imap (or IMAP)
-# apop (or APOP)
-# rpop (or RPOP)
-# kpop (or KPOP)
-# etrn (or ETRN)
-#
-# Legal authentication types are
-# login
-# kerberos
-#
-# Legal global option statements are
-#
-# set logfile = -- must be followed by a string
-#
-# The noise keywords `and', `with', `has', `wants', and `options' are ignored
-# anywhere in an entry; they can be used to make it resemble English. The
-# punctuation characters `,' `:' `;' are also ignored.
-#