Using strace, I can see mail opens a pipe to /usr/sbin/sendmail and sends, in the case of an intended recipient of "foo=bar", a To header of
To: <foo@athens>, <=@athens>, <bar@athens>
athens is the name of the local host, so the fault seems to clearly lie with mailutils.
Using strace, I can see mail opens a pipe to /usr/sbin/sendmail and sends, in the case of an intended recipient of "foo=bar", a To header of
To: <foo@athens>, <=@athens>, <bar@athens>
athens is the name of the local host, so the fault seems to clearly lie with mailutils.