Ultr3.1,undocum. mailer flag in sendmail.cf
Jeff Michaud
michaud at devax.dec.com
Fri Sep 29 10:49:02 AEST 1989
> I believe it indicates to Ultrix sendmail that it should speak a special
> extended SMTP to the mail11v3 program. The extended SMTP includes a
mechanism
> to allow mail11v3 to look at the headers of the RFC822 message before
> verifying that any recipients are valid. This makes for a easier interface
> to the MAIL-11 protocol, where it's helpful to know what the message headers
> look like *before* you open the DECnet connection, and therefore before you
> ask the remote MAIL-11 object whether any recipient(s) are valid.
Correct. The MAIL-11 protocol uses what's known as optional data
associated with a connection request to the remote system. The
optional data contains a couple of key pieces of information that
need to be known at connection establishment time. mail11v3 needs
to know if there is a Cc: line, and it also needs to know if the
message being sent is a DDIF/CDA/capsar (or whatever you want to call
it :-) message.
> Mail11v3 won't work unless you speak extended SMTP to it. This means
> you can't use mail11v3 with e.g., Berkeley sendmail. Incidentally, the
> extended SMTP protocol (as far as I can tell) is also undocumented.
Correct again. I made sure to state that in the release notes.
We also don't document the two extra SMTP commands (HEAD and MULT)
because I didn't want to commit ourselves to those commands at this point
in time. The two extra commands only get invoked if the appropriate
mailer flags are defined for the mailer.
/--------------------------------------------------------------\
|Jeff Michaud michaud at decwrl.dec.com michaud at decvax.dec.com|
|DECnet-ULTRIX #include <standard/disclaimer.h> |
\--------------------------------------------------------------/
More information about the Comp.unix.ultrix
mailing list