[tor-bugs] #19914 [Internal Services/Service - lists]: DKIM causing trouble with Tor lists, should be stripped

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#19914: DKIM causing trouble with Tor lists, should be stripped
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 Reporter:  starlight                          |          Owner:  qbi
     Type:  defect                             |         Status:  new
 Priority:  Medium                             |      Milestone:
Component:  Internal Services/Service - lists  |        Version:
 Severity:  Normal                             |     Resolution:
 Keywords:                                     |  Actual Points:
Parent ID:                                     |         Points:
 Reviewer:                                     |        Sponsor:
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Comment (by starlight):

 Is troublesome to leave messages in intact since inserting [list-name] at
 the front of subject lines is a major convention.  Without random space
 insertion as a factor one can manually add [list-name] and configure the
 l=<body_size> field when sending and obtain good signatures (I've done
 this), but as a practical matter most people will not expend such effort.

 In general mailing list servers simply strip out the DKIM-Signature: and
 related headers, which is better than forwarding DKIM-fail messages.

 In theory a second Subject: header can be prepended that DKIM will not
 check, but the core SMTP RFCs specify that only one instance of this field
 should exist.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19914#comment:3>
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