gds@spam.istc.sri.com (Greg Skinner) (04/01/88)
For those who are unfamiliar, sendmail attempts an SMTP session for each message in the queue. When on networks where bandwidth is at a premium, this may be fine. Where it is not, it can be expensive, especially when it involves repeatedly tearing down and setting up a TCP connection. I did some checking and discovered that SMTP was perfectly willing to accept multiple mail transactions to the same host for 4.[23]bsd systems. There was a noticeably longer pause between the first "mail from" command and subsequent "mail from"'s, but it did work. I may have an opportunity to rewrite sendmail to make multiple mail transactions to the same host within one SMTP session. I'd like to know if anyone else has done this on a 4.[23]bsd system (can I get the patches :-), if any other mail delivery agents do this, and how people feel about it. --gregbo