The $r sendmail macro holds as its value the protocol that is used in receiving a mail message (usually SMTP or UUCP, $r). The $s sendmail macro holds as its value the name of the sending host ($s). Some programs, such as UUCP, need to be able to set the values of these macros from the command line. The old way to set them looked like this: -oMrUUCP -oMslady Here, the M option sets $r to be UUCP and $s to be lady . Under V8 sendmail the setting of $r and $s has been simplified. A command-line single switch, -p , can be used to set them both: -p rval:sval Here, the rval is the value assigned to $r , and the sval is the value assigned to $s . The two are separated by a colon . If the sval is omitted, the colon should also be omitted. |