[Mailman-Users] OT: Yahoo Deferrals

Ralf Hildebrandt Ralf.Hildebrandt at charite.de
Fri Oct 2 19:12:12 CEST 2009

* Jeff Grossman <jeffg at turners.com>:
> I have a question regarding Yahoo deferrals.  I know this subject has
> been talked about a lot.  Everything I could find via Google was from at
> least a year ago though.  I was wondering if anybody has found new ways
> of limiting the Yahoo deferrals?  I run two mailing lists.

I run (with others) mail.python.org, and we send assloads of mail to

What we did:

* set up DKIM for python.org
* subscribed to/set up Yahoo's FBL: http://feedbackloop.yahoo.net/
* made sure that whoever complains @yahoo gets unsubscribed silently
  within a jiffy.

We haven't seen any large scale deferrals for a long time now.

I also use:
yahoo.com  	slow:
in transport_maps with

slow      unix  -       -       -       -       -       smtp
in master.cf and

slow_delivery_rate_delay = 1s
in main.cf

Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de

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