From owner-freebsd-hackers Tue Feb 20 16:20:23 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from sdmail0.sd.bmarts.com (sdmail0.sd.bmarts.com [192.215.234.86]) by hub.freebsd.org (Postfix) with SMTP id F346137B4EC for ; Tue, 20 Feb 2001 16:20:18 -0800 (PST) (envelope-from gordont@bluemtn.net) Received: (qmail 16979 invoked by uid 1078); 21 Feb 2001 00:20:16 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 21 Feb 2001 00:20:16 -0000 Date: Tue, 20 Feb 2001 16:20:15 -0800 (PST) From: Gordon Tetlow X-X-Sender: To: Dan Phoenix Cc: Jesper Skriver , Subject: Re: qmail IO--qmail vs postfix competition In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 20 Feb 2001, Dan Phoenix wrote: > Just curious how you pull this off? > so 4 million/30=133 thousand emails per mail server roughly. > So how do you distribute between the machines evenly ....into ezmlm as > well? We use Alteon load balancers to take care of the balancing part, after that, qmail just works. We did add a hack for a deferral server option to qmail, meaning after 10 minutes of undeliverable mail (configurable), the mail gets tossed to another server that tries for up to 2 days before discarding. This keeps our frontline mailservers from dealing with all the people that can't spell hotmail.com (you wouldn't believe the number). The frontline mailservers peaked at about 600-800 messages in the queue when sending out the 4 million while the deferral servers were sitting about 10000 messages (up from a normal 7000 or so, also we had 8 deferrals in rotation). Also of importance is that we are whitelisted everywhere possible to make sure that we are rate limited on the amount of mail we send (aol is a good example of that). I think that describes the general gist of our mail situation. -gordon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message