Ff

F=f

---

Delivery agent adds -f to argv

All versions

If sendmail is run with a -f command-line argument (-f) and if the F=f delivery agent flag is specified, the A= for this delivery agent will have the two additional arguments -f and $g inserted between its argv[0] and argv[1] . For example, if sendmail is run as:

 /usr/lib/sendmail -f jim host!bill 

and if the delivery agent for sending to host is defined as:

 Muucp, P=/bin/uux, F=fmsDFMhuU, S=13, R=23, A=uux - -r $h!rmail ($u) 

the f in F=fmsDFhuU causes the A= of:

 A=uux - -r $h@rmail ($u) 

to be rewritten as:

 A=uux -f $g - -r $h@rmail ($u) 

Here, $g is jim from the original command line (but rewritten to be a return address relative to the recipient). The original -f argument jim is first rewritten by the canonify rule set 3, the rule set 1, and then the final rule set 4. The result of those rewrites is placed into $f . The $f sendmail macro is rewritten by the canonify rule set 3, the rule set 1, the S= rule set, and then the final rule set 4, and the result is placed into $g . ( $f and $g are described in $g.)

Note that the F=f and the F=r delivery agent flags are very similar and easily confused .