-----Original Message-----
From: Tony Finch [mailto:fanf2(_at_)hermes(_dot_)cam(_dot_)ac(_dot_)uk] On
Behalf Of Tony Finch
Sent: Thursday, August 18, 2011 4:14 AM
To: Murray S. Kucherawy
Cc: ietf-smtp(_at_)imc(_dot_)org
Subject: RE: Mail Data termination
Murray S. Kucherawy <msk(_at_)cloudmark(_dot_)com> wrote:
One of the more ubiquitous MTAs out there has a feature called
"connection caching" where it will keep some fixed number of outbound
SMTP connections around, cycled using an LRU method, in case a new
message arrives that is routed to a recent destination to avoid the cost
of making a new connection and doing the initial SMTP negotiation.
I believe Postfix and Exchange can do this.
And I was referring to Sendmail.
The more SMTP clients there are that do this, the more likely it is that a
server demanding QUIT before scheduling a delivery attempt will lose mail.