On Monday 22 September 2003 15:41, Dean Anderson wrote: > On Sun, 21 Sep 2003, Larry Smith wrote: > > > Both of these are perfectly valid responses. You get them at the same > > > time, or you get the second one sooner. > > > > Not quite totally true. In the second case - it _will_ connect and > > initiate the transfer (helo, mail from, rcpt to) phase of _sending_ the > > message. It will fail, but it will make the attempt. Whereas with the > > first case it will never try. The second is much, much slower from the > > perspective of a mail server. > > Some may never try. Sendmail won't try in that case. But it is perfectly > valid to wait and try again. In such a case, the wait time is typical 3 to > 5 days. > > In the second case, it takes usually about 300ms to setup a tcp > connection, and fail. This 300ms isn't too long to wait. I doubt that > most people would notice. Quite a lot of fuss over 300ms, I think. > > And I am just thrilled to see IE not go to MSN when I type in a wrong > name. I've been showing this to everyone. Most people like the > demonstration, and trust Verisign more than Microsoft. > > --Dean Hmmm, maybe 300ms is not a long time for a "person" - but when one has say several thousand messages in queue on a server, it starts to add up quickly and this was the original context of the thread I believe - them "impact" on mail servers trying to deliver mail. -- Larry Smith SysAd ECSIS.NET sysad@ecsis.net