[kmail2] [Bug 457262] New: Generate privacy-aware Message-Ids

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=457262

            Bug ID: 457262
           Summary: Generate privacy-aware Message-Ids
           Product: kmail2
           Version: 5.20.3
          Platform: Other
                OS: Other
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: Martin at Lichtvoll.de
  Target Milestone: ---

KMail by default uses the local host name as suffix for Message-Id. This has
two downsides:

1. It reveals the local hostname even in case a privacy aware mail server
removed the first Received: header.
2. It is not guaranteed to be unique.

I'd not mind the second disadvantage as there is no easy way to make the second
part unique to begin with, unless you generate some kind of UUID for that. But
doing so might have other privacy implications.

A good default might be to use the domain name from an SMTP transport. Or the
domain part of the mail address in an identity.

This bug could also be in a different product/component like Akonadi / Mail
dispatcher agent, but it really depends on where this configuration option
would best be implemented.

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