mention How to Alter the Behavior of 'mail' from the command line with e.g., --set

積丹尼 Dan Jacobson <[email protected]> Fri, 25 Jun 2021 00:57:19 +0800
Newsgroups gmane.comp.gnu.mailutils.bugs
Message-ID <[email protected]>
(info "(mailutils) Mail Variables") says

   3.5.6 How to Alter the Behavior of 'mail'
   -----------------------------------------

   Following variables control the behavior of GNU 'mail':

Mention [yes, also right on that page!] if one can use e.g.,
$ mail --set=sendmail=sendmail:/usr/lib/sendmail ...
$ mail --set=sendmail=/usr/lib/sendmail ...
$ mail --set=sendmail=/usr/lib/sendmail ...
$ mail --set=sendmail=/usr/lib/sendmail ...
$ mail --set=metoo=False
etc. to in some fashion alter them from the command line, and why not if not.