On Fri, 2017-05-26 at 17:13 +0100, Ken O'Driscoll wrote:
> I encountered something similar. Running sendmail/opendkim for
> outbound
> mail and saw intermittent DKIM failures.
> 
> On further investigation, I have narrowed my failures down to sending
> from
> my main MUA, Evolution. All my testing showed that other MUAs,
> including
> the Gmail mobile client, the BlackBerry mail client, Windows mail and
> Outlook 2016 work fine and the mail gets signed correctly. Only
> Evolution
> causes the signature to break, and it seems to happen all the time,
> regardless of any changes I make to the (rather limited) client-side
> encoding options.
> 
> However, Evolution relaying though a Google Apps domain with DKIM
> enabled
> works fine. So, I'm thinking it's a quirk somewhere between
> Evolution,
> sendmail and opendkim.
> 
> There are some forum posts about Thunderbird users having similar
> issues
> but they don't seem to have any resolution.
> 
> Would love to solve this issue but simply too busy at the moment to
> do
> further diagnostics.
> 
> Any suggestions would be very welcome as long they don't involve
> swapping
> out sendmail or Evolution!

I won't suggest it, but Evolution (3.24.2) with Postfix (3.1.0) and
Amavisd-new (for DKIM signing) works perfectly. See https://www.mail-te
ster.com/web-mvts8.

> 
> Ken.
> 
> On Fri, 2017-05-26 at 08:00 -0700, Carl Byington wrote:
> > Using sendmail with opendkim for signing mostly works, but I have a
> > few
> > domains with dmarc p=reject, and looking at the aggregate reports,
> > I am
> > seeing some dkim=fail, spf=pass on a small amount of mail going to
> > google, comcast, etc. The aggregate reports show that mail is
> > signed
> > with the right selector (default._domainkey.lynchexhibits.com).
> > 
> > lynchexhibits.com mail leaving ns27.routerdog2.com.
> > 
> > I have been unable to reproduce this by sending test messages to my
> > google test account. It may not be specific to sendmail/opendkim,
> > since
> > I also see the same infrequent errors with another domain:
> > 
> > mbmg-media.com mail leaving *.outbound.protection.outlook.com.
> > 
> > Of course, that mail was never touched by sendmail/opendkim.
> > 
> > Any ideas for debugging this?
> 
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-- 
Jim Ohlstein
Professional Mailman Hosting
https://mailman-hosting.com/

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