The line in the configuration file that tells sendmail
how to transport over UUCP might look, in part, like this:
Muucp, P=/usr/bin/uux, F=DFMhuUd, S=12, R=22/42, M=10000000,
This line tells sendmail to send UUCP network mail by running the /usr/bin/uux
(UNIX to UNIX eXecute) program.
1.6.10 Role in Other Protocols
sendmail can use many other kinds of network protocols to transport email. Some of
them might have shown up when you ran grep earlier. Other common possibilities
might look, in part, like one of these:
Mfax, P=/usr/local/bin/faxmail, F=DFMhu, S=14, R=24, M=100000,
Mmail11, P=/usr/etc/mail11, F=nsFx, S=Mail11From, R=Mail11To,
Mmac, P=/usr/bin/macmail, F=CDFMmpsu, S=MailMacFrom, R=MailMacTo, A=macmail -t $u
The Mfax line defines one of the many possible ways to send a fax using sendmail. A
fax machine transports images of documents over telephone lines. In the preceding
configuration line, the /usr/local/bin/faxmail program is run, and a mail message is
fed to it for conversion to and transmission as a fax image.
The Mmail11 line defines a way of using the mail11(1) program to transport email
over a DECnet network, used mostly by the Open VMS operating system (formerly
by Digital Equipment Corporation).
The Mmac line defines a way to transport mail to Macintosh machines that are connected
on an AppleTalk network.
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