Date: Sun, 29 Apr 2007 08:00:37 -0500 From: Eric Crist <mnslinky@gmail.com> To: Ted Mittelstaedt <tedm@toybox.placo.com> Cc: Grant Peel <gpeel@thenetnow.com>, Christopher Hilton <chris@vindaloo.com>, freebsd-questions@freebsd.org, Bart Silverstrim <bsilver@chrononomicon.com> Subject: Re: Greylisting -- Was: Anti Spam Message-ID: <0674B8B4-EB98-4876-AB35-51D0FD550680@gmail.com> In-Reply-To: <BMEDLGAENEKCJFGODFOCEEAHCAAA.tedm@toybox.placo.com> References: <BMEDLGAENEKCJFGODFOCEEAHCAAA.tedm@toybox.placo.com>
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On Apr 29, 2007, at 4:00 AMApr 29, 2007, Ted Mittelstaedt wrote: > > If the monitoring system notices something down, I have to know about > it within a few minutes. I cannot wait for the mailserver that > sends the > page out to retry sending the page to the cell carrier's mailserver > in an hour. > > Things go down rarely. The moonitoring system is not continually > sending > out pages to my cell phone every day. Many times many months will > pass > in between the monitoring system sending my cell phone a page. If the > cell phone company was running greylisting, any whitelist entry for my > monitoring system would be gone by then. > >> Even if it does take an hour, the fact that it retried the server on >> the other side doing the greylisting means it would be whitelisted >> after a couple mails. > > But the whitelist would have expired by the next time there was a > problem. > >> If you're doing something SO critical that >> three or four mails delayed an hour, until you're establishes as a >> legit user, means life or death, you definitely should be doing >> something that backs up how you communicate with other sites, > > I'm monitoring systems at the ISP I work at. No, it is not life or > death > if a feed goes down for 3 hours and a bunch of people cannot download > their daily freebsd-questions mailing list fix. At least, I don't > think > so. But they do. And as their money that buys the ISP's product puts > the bread on my table, I have to do what they want. And they want > instant > response if there is a problem in the ISP's systems. That won't > happen if > the monitoring system's e-mails that get sent out when there is a > problem > lie around in a mail queue for an hour waiting for a greylist at the > cell company to let the messages through. My ISP has a FreeBSD with a GSM modem with text messaging service. They send actual text messages across the cellular network - instantly. No email required. Perhaps you folks could do that?
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