-d

-d

---

Allow old-style -d execution

mail.local command-line switch

The original mail.local program was executed like this:

 mail.local -d   user   

Here, mail.local is not running LMTP (the -l command-line switch is absent). Instead, it is running just like the old /bin/mail program. It reads from its standard input and writes to the user 's mailbox.

The modern mail.local program can be run like this:

 mail.local  user  

This invocation has the same effect as the first one earlier. Thus, the use of -d is optional and can be included or omitted with no change in effect.