Re: qmail remote delivery logic

[Steve Vertigan]

Dave Sill wrote:

> Say you send a message to a list of 10,000 addresses using
> sendmail. What's the first thing it does? It looks up the MX for each
> recipient so it can sort by MX and minimize the number of connections.

Why is that?  Lets say you have to deliver to [EMAIL PROTECTED], [EMAIL PROTECTED] and
[EMAIL PROTECTED]  Why wouldn't a well-written mta assume that the MX for
aol.com is most likely going to be the same as for aol.com, and aol.com?  If
the MX lookup is done after sorting by domain wouldn't that reduce dns
traffic?

Regards,
--Steve