🚀 go-pugleaf

"David Herron" <david@twg.com> writes:

> The flag on sendmail is apparently something added in one of the commonly
> available patched sendmails (IDA?).  It is done by

> 	/usr/lib/sendmail -Rhost.name

IDA does indeed do this (others might also).  A good feature of this is
that the host.name is matched as an arbitrary substring in the recipient
list, so it will match subdomains of host.name and source routes.
Unfortunately it will also match user%host.name@dead.host,
host.name@real.other.host, etc.

> With either one on a dial up SLIP the server system hasn't a way to know
> when the client system is attached.  Unless the client system is allowed to
> do something to the server system to notify that it's there.

Some Internet service providers have hooked into the finger daemon to do
this, which is trivial and seems to work.  The kickd is definitely a nicer
solution, since you can also trigger nntpxmit, change the routing table,
etc, without changing C code.

Someone else, long ago, mentioned that you should probably start 2
sendmails in parallel since a single sendmail spends most of its time
waiting for responses or for nameserver data.

-- 
Tom Fitzgerald    Wang Labs, Lowell MA, USA    fitz@wang.com   1-508-967-5278