Fr

F=r

---

Delivery agent adds -r to argv

All versions

If sendmail is run with a -f command-line argument, and if the F=r delivery agent flag is specified, the A= for this delivery agent has the two additional arguments, -r and $g , inserted between its argv[0] and argv[1] .

Consider a case in which sendmail is run as:

 /usr/lib/sendmail -f jim bill 

If bill is a local user and the delivery agent for local is defined as:

 Mlocal, P=/bin/mail, F=  r  lsDFMmnP, S=10, R=20, A=mail -d $u   note  

the r in F= r lsDFmnP will cause the A= of:

 A=mail -d $u 

to be rewritten as:

 A=mail  -r $g  -d $u 

The $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 the final rule set 4. The result of those rewrites is placed into $f ($f). The $f sendmail macro is rewritten by the canonify rule set 3, the rule set 1, the S= rule set, and the final rule set 4, and the result is placed into $g ($g).

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