Just as all
addresses are first rewritten by the
set 3, so are all addresses rewritten last by the
final rule set 4. Beginning with V8.10
sendmail, that rule set is declared like this:
As the name
final implies, the job is to undo any
special processing done by the
canonify rule set
3, such as focusing. In this section we’ll examine
final rule set 4 rules.
Under some versions of sendmail a successful conversion to a fully qualified domain name leaves an extra dot trailing the result. This rule strips that dot:
# strip trailing dot off possibly canonical name R $* <@ $+. > $* $1 <@ $2 > $3
Note that this rule recursively removes as many trailing dots as it finds. Also note that the host part remains focused after rewriting.
Recall that the
canonify rule set 3 converted the
commas of source route addresses into colons (Section 19.3.3). The
final rule set 4 now
needs to restore those commas:
R $* : $+ :$+ <@ $+> $1 , $2 : $3 <@ $4> <route-addr> canonical
This rule recursively changes all but one (the rightmost) colon back into a comma.
As a special note, under V8 sendmail,
envelope-sender route addresses are always surrounded by angle
brackets when passed to the delivery agent. If this behavior is
inappropriate for your site, beginning with V8.7 it is possible to
prevent this heuristic by specifying the
delivery agent flag (F=d).
final rule set 4 also removes angle ...