Date: Sun, 29 Dec 2002 10:50:00 -0800 From: John Martinez <rolnif@mac.com> To: Len Conrad <LConrad@Go2France.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: What are the SMTP rules for sending mail to FreeBSD Message-ID: <55587136-1B5E-11D7-A17C-0003937C0B34@mac.com> In-Reply-To: <5.1.1.6.2.20021229120024.02033e30@mail.go2france.com>
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On Sunday, December 29, 2002, at 10:06 AM, Len Conrad wrote: > >> ISTR Postfix replies with 450 to (almost) all errors by default. > > And there are errors where you need to escalate the 4xx response to > 554 to stop the sending MTA from re-trying for days, or just harvest > the 4xx ip's to a new .map filean block with 554. > > Postfix's new "sender address verification" is extremely effective in > blocking crap that used to get through, but it always returns 4xx so > your reject counts go through the roof as SAV 4xx rejects are re-tried > 100's of times. But, in fact, this is more of a resource consumption > for the senders than it is on your MX. And the advantage of keeping > this crap out of your system outweighs the higher rate of repeated > rejects. Sounds great. Maybe I'll convert to Postfix soon enough! -john To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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