Date: Tue, 20 Feb 2001 16:20:15 -0800 (PST) From: Gordon Tetlow <gordont@bluemtn.net> To: Dan Phoenix <dphoenix@bravenet.com> Cc: Jesper Skriver <jesper@FreeBSD.org>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: qmail IO--qmail vs postfix competition Message-ID: <Pine.BSF.4.31.0102201600430.18356-100000@sdmail0.sd.bmarts.com> In-Reply-To: <Pine.BSO.4.21.0102201551040.30504-100000@gandalf.bravenet.com>
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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
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