Only if they are silly enough to accept more connections than they can
handle. :) One of the things a sys admin is "supposed" to do is tune his
machines for performance. If you cannot limit the number of connections
you will accept to something your system can handle, you need to re-think
your setup.
On Mon, 12 Apr 1999, Marc Slemko wrote:
> On Mon, 12 Apr 1999, Dave Sill wrote:
>
> > "Fred Lindberg" <[EMAIL PROTECTED]> wrote:
> > >
> > >qmail will always be faster than sendmail [unless you send one message
> > >to a large number of addresses on the same remote host].
> >
> > No, qmail will usually win here, too, because sendmail serializes.
> > Sendmail only wins when the message is huge.
>
> Actually, if you are unfortunate enough to have a list of addresses sorted
> by the right side of the @, qmail can be a big loser here. This is
> because it will completely overload many remote hosts if there are a bunch
> of recipients. eg. concurrencyremote = 120, you have 200 users
> @somedomain, qmail will sit there with 120 connections to somedomain's
> mailserver open while they all crawl along because somedomain can't handle
> 120 connections at once.
>
> qmail is great that way at inflicting remote DoS attacks against other
> mailers.
>
>
---------------------------------
Timothy L. Mayo mailto:[EMAIL PROTECTED]
Senior Systems Administrator
localconnect(sm)
http://www.localconnect.net/
The National Business Network Inc. http://www.nb.net/
One Monroeville Center, Suite 850
Monroeville, PA 15146
(412) 810-8888 Phone
(412) 810-8886 Fax
