The mailing list for listmasters using Sympa

[Miles Fidelman <address@concealed>]

Do you know of way to apply remove_headers to all lists?

Thanks,

Miles

Steve Shipway wrote:
> Sorry, by ‘we’ I meant my site (University of Auckland).  I am not 
> affiliated with the Sympa project other than as having submitted a few 
> patches for consideration.  Apologies if any confusion there.
>
> To strip incoming DKIM headers, use something like:
>
> remove_headers DKIM-Signature
>
> in the list configuration.  This is a comma separated list; this 
> example strips the DKIM header.
>
> If your sender is using SIDF with a badly designed record, or the 
> recipient has a bad SIDF checking implementation,  then the From line 
> gets checked against SPF and fails, though the PRA checks Should use 
> the Sender header (which identifies Sympa) instead of the From line.  
> In this case you’d need to set the list to anonymise the sender by 
> replacing the From line.
>
> Steve
>
> *Steve Shipway*
>
> address@concealed
>
> *From:*address@concealed 
> [mailto:address@concealed] *On Behalf Of *Erik Olson
> *Sent:* Monday, 7 April 2014 8:36 p.m.
> *To:* address@concealed
> *Subject:* Re: [sympa-users] problems with DMARC?
>
> When you say "we", do you mean sympa as a whole, or your site's 
> implementation details?
>
> From what I have read thus far this evening, if the "From:" line is 
> not mangled to remove the original sender "address@concealed" 
> <mailto:address@concealed>, this will cause the reject, because the 
> recipient will check the DMARC records against the From: line.
>
>   - Erik
>
> On 2014-04-07 07:45, Steve Shipway wrote:
>
>     If a message has a DMARC header, but is relayed via your list
>     which will change the message, you'll get an invalid DMARC
>     signature and some sites will therefore reject it.
>
>     What we do is to strip any incoming DMARC and DKIM headers from
>     messages going to lists using the remove headers option in Sympa. 
>     Then, we add our own DKIM signatures on the way out.
>
>     Steve
>
>     *Steve Shipway*
>
>     University of Auckland ITS
>
>     /UNIX Systems Design Lead/
>
>     address@concealed <mailto:address@concealed>
>
>     Ph: +64 9 373 7599 ext 86487
>
>     ------------------------------------------------------------------------
>
> --
> *Erik Olson*
> /Proudly joining 21st Century e-mail in 2013/


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In theory, there is no difference between theory and practice.
In practice, there is.   .... Yogi Berra