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Copying yahoo to maximise compatibility with other servers

 

 

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ma1l1ists at yahoo

Jul 30, 2010, 12:21 PM

Post #1 of 3 (430 views)
Permalink
Copying yahoo to maximise compatibility with other servers

When looking for the best way of implementing dkim with qmail. I came
across the following link.

"http://www.mail-archive.com/dkim-milter-discuss [at] lists/msg01699.html"

Which says

It turns out
that dkim-milter's library (libdkim) and also older versions of
OpenDKIM's library (libopendkim) contained a bug in relaxed body
canonicalization, which is the mode Yahoo! uses. OpenDKIM v1.2.0
contained a fix for this. As they upgrade their servers to contain
that patch, older software without the fix will begin getting
verification errors from Yahoo!.

Does anyone know what yahoo uses or a good way of using libopendkim
with qmail. Or alternatively whether libdkim or the dkim perl module
("http://www.memoryhole.net/qmail#dkim") will avoid these verification
errors.


ma1l1ists at yahoo

Jul 31, 2010, 9:11 AM

Post #2 of 3 (392 views)
Permalink
Re: Copying yahoo to maximise compatibility with other servers [In reply to]

>> Hi,
>>
>> I ran into problems with DKIM and have since switched to domainkeys.
>>We send tons of emails to yahoo and no problems. Also we are using
>>senderscore (which require the use of dkim or domainkeys) and no
>>problems.


Fair enough and thanks, I guess I could do that then, but yahoo do use
dkim with qmail as the following from one of their marketing mails
shows.

"Authentication-Results: mta118.mail.ird.yahoo.com
from=cc.yahoo-inc.com; domainkeys=pass (ok); from=cc.yahoo-inc.com;
dkim=pass (ok)"

I was hoping someone could tell me what they use so that I could be
in the same boat because servers HAVE TO/Certainly should be compatible
with yahoo.

I guess I can always try the different methods and see what happens but
I'd rather someone could give me a tip off.


On Fri, 30 Jul 2010 20:53:47 +0100
Kevin Chadwick <ma1l1ists [at] yahoo> wrote:

> When looking for the best way of implementing dkim with qmail. I came
> across the following link.
>
> "http://www.mail-archive.com/dkim-milter-discuss [at] lists/msg01699.html"
>
> Which says
>
> It turns out
> that dkim-milter's library (libdkim) and also older versions of
> OpenDKIM's library (libopendkim) contained a bug in relaxed body
> canonicalization, which is the mode Yahoo! uses. OpenDKIM v1.2.0
> contained a fix for this. As they upgrade their servers to contain
> that patch, older software without the fix will begin getting
> verification errors from Yahoo!.
>
> Does anyone know what yahoo uses or a good way of using libopendkim
> with qmail. Or alternatively whether libdkim or the dkim perl module
> ("http://www.memoryhole.net/qmail#dkim") will avoid these verification
> errors.


kyle-qmail at memoryhole

Aug 1, 2010, 6:09 AM

Post #3 of 3 (386 views)
Permalink
Re: Copying yahoo to maximise compatibility with other servers [In reply to]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

I'm the author of the shim script to use the dkim perl module with
qmail---I use it extensively---and I've never had a problem with Yahoo
DKIM verification. I don't think the Mail::DKIM module had the same
bug as OpenDKIM and/or libdkim. That said, I certainly can't
*guarantee* compatibility, I'm just providing a bit of a testimonial.

~Kyle
- --
It has been my experience that folks who have no vices have very few
virtues.
-- Abraham Lincoln
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