Remove the X- prefix from some headers

Bug #883193 reported by Barry Warsaw
This bug affects 1 person
Affects Status Importance Assigned to Milestone
GNU Mailman

Bug Description

MM3 still uses a lot of X- headers, but some of the X- prefixes can be removed. In general, we can just claim the Mailman- prefix for Mailman specific headers. Candidates include:

Mailman-LMTP-MailFrom (i.e. X-MailFrom)
Mailman-Copy (or remove this header)
Mailman-Content-Filter (from X-Content-Filtered-By)

Also, fix the outdated comments about add-dup-header in and

Probably also get rid of X-List-Administrivia (and possibly reduced_list_headers). These seem unnecessary now.

Tags: mailman3
Revision history for this message
Barry Warsaw (barry) wrote :

Also, from the mailman-developers thread, possibly:

X-Mailman-Version -> List-Agent
X-Mailman-Approved-At -> List-Approved-Date

Revision history for this message
Barry Warsaw (barry) wrote :

See User-Agent description for possible syntax of List-Agent. There's also currently some debate in the mailing list about whether it should be Mediator, User-Agent, or List-Agent.

Revision history for this message
Barry Warsaw (barry) wrote :
Barry Warsaw (barry)
Changed in mailman:
status: New → Confirmed
importance: Undecided → Low
Revision history for this message
Abhilash Raj (raj-abhilash1) wrote :

This bug has been moved to the new gitlab repo here:

Revision history for this message
Junien Fridrick (axino) wrote :

Why would X-List-Administrivia be unnecessary now ?

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