[Outages-discussion] [outages] Level 3 blip

[Jeremy Chadwick]

The delays are likely due to greylisting, but every X-Greylist header I
see from puck.nether.net indicates greylisting delays aren't happening.

> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6
>	(puck.nether.net [204.42.254.5]); Mon, 07 Nov 2011 14:49:58 -0500 (EST)
> X-Greylist: Recipient e-mail whitelisted, not delayed by milter-greylist-4.2.6
>	(puck.nether.net [204.42.254.5]); Mon, 07 Nov 2011 10:07:53 -0500 (EST)

Of course one will need to review the headers for every Email sent, but
I can confirm the delays.

People who deploy use of greylisting often forget one key/important
fact: the retry interval of delivery is entirely dependent upon the mail
server attempting the delivery, not the server doing the greylisting.
That interval could be 5 minutes, or it could be 4 hours.  It's entirely
up to the system administrator to decide.  And that downside to
greylisting is exactly why so many people choose not to use it any more
(read: users expect mail to be delivered quickly).

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |

On Mon, Nov 07, 2011 at 02:55:44PM -0500, Wallace Keith wrote:
> Maybe this should be on discussion ,   but the posts here are so far delayed, the board is not even useful.
> If you want info on this am's craziness, check NANOG.
> -Keith
> 
> From: outages-bounces at outages.org [mailto:outages-bounces at outages.org] On Behalf Of Adam Greene
> Sent: Monday, November 07, 2011 9:45 AM
> To: outages at outages.org
> Subject: Re: [outages] Level 3 blip
> 
> Another announcement:
> 
> -------- Original Message --------
> Subject:
> 
> FW: NYC TIME WARNER OUTAGE
> 
> Date:
> 
> Mon, 7 Nov 2011 09:41:00 -0500
> 
> 
> Hi All,
> 
> TW Outage Should be Resolved at this time( Fiber Backhaul Issue) - Please advise if any of your clients  are still experiencing issues with Their TW Services
> 
> 
> On 11/7/2011 9:36 AM, Adam Greene wrote:
> Hmm ... just received this as well from a Time Warner agent ... Time Warner is 12271 in one of the AS-PATHs below.
> 
> -------- Original Message --------
> Subject:
> 
> NYC TIME WARNER OUTAGE
> 
> Date:
> 
> Mon, 7 Nov 2011 09:26:15 -0500
> 
> 
> Hi All,
> 
> TW is Currently Experiencing a Large Scale TW Outage in NYC- Please Advise your clients if they call you directly
> 
> 
> 
> On 11/7/2011 9:32 AM, Adam Greene wrote:
> I think Level 3 just had a major burp in the NY area.
> 
> Both ASN 20208 and ASN 11579 were dead in the water from about 9:12am - 9:19am EST.
> 
> These are the paths in question:
> 
> 20208 12271 7843 3356
> 11579 3356
> 
> Just a heads up ...
> 
> thanks,
> Adam
> 

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