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Date:         Sun, 10 Feb 2008 09:54:05 -0800
Reply-To:     Michael Elliott <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Michael Elliott <camping.elliott@GMAIL.COM>
Subject:      Re: No emails!!!
Comments: To: John Goubeaux <john@UCSB.EDU>
In-Reply-To:  <47AE4021.30608@ucsb.edu>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hey John -- thanks for sharing what you know about how these things work.

-- Mike "Rocket J Squirrel" Elliott 71 Type 2: the Wonderbus 84 Westfalia: Mellow Yellow ("The Electrical Banana") 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano KG6RCR

On 2/9/2008 4:06 PM John Goubeaux wrote:

> I have not seen any issues with gmail (not to say that there aren't > any). We deliver a large amount of mail to both yahoo and gmail and i > noticed substantial delays in outbound mail destined for yahoo last > Fall. I have heard the same from some large isps/universities confirming > this and it is still happening. How gmail and yahoo handle spam, and or > attempt to slow it down and drop connections are beyond me, and trying > to get anyone to talk to you there is like trying to get an appointment > with the pope. It looks like yahoo is using some sort of what is often > referred to as "grey listing" where you just deny (or throttle back) > connections from certain MTAs knowing that the legit ones will try again > later and spammers will often not. One big problem with this is that > folks are used to mail delivery taking minutes and this can make it > take hours or maybe days? It's not a very sophisticated method of > handling spam but it tends to be effective. But think about it for a > minute, you are gmail and you see a connection from gerry.vanagon.com > that attempts to send to hundreds, maybe more of your users (all at > once), this might be reason to throttle back or delay the connection as > this is how spammers deliver mail. > > I don't know qmail too well ( we use mostly sun jes and sendmail) and I > don't know how gerry.vanagon.com list "hooks into it" and if, when > mail can't be delivered, if the list server software holds it and > retries, or the MTA (qmail) queues it and attempts to deliver on some > regular interval for some determined period (the standard is 4 days) If > it is the former, then maybe there is a bunch of mail clogging the > listserve and it needs some attention. It sounds like what Jim did last > yr might be in order again and or some tests to see when and where > things are hanging up. > > -john > > Michael Elliott wrote: >> How about gmail -- my list messages cut off for more than 24 hours >> earlier this week (but not non-gerry messages), lurched forward and >> caught up, slowly passed on smatterings of older messages, cut off, >> re-started, and maybe seems to be working fine now for gerry stuff. >> Other gmail users have reported the same thing -- again, no problem >> with non-gerry messages. >> >> When this happened last year Jim Arnott took a look and found that >> some logfiles -- or maybe it was gerry's gutters? -- needed cleaning. >> Once they were cleaned, things returned to normal. Didn't improve the >> /quality/ of gerry traffic, but traffic was back up to speed. I don't >> know if Jim can do anything about the quality thing. I know I'm not >> helping. >>


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