Public bug reported:
MM3 uses List-Post headers to detect mail loops now, so X-BeenThere can be removed entirely. It makes no sense to detect the MM2 legacy X-BeenThere header in MM3.
Most examples currently are in the test suite, however the cook_header.py handler still sets it, and this should be removed.
** Affects: mailman Importance: Undecided Status: New
** Tags: mailman3
Also, fix gate_news.py to recognize List-Post.
This was fixed in alpha 6.
** Changed in: mailman Status: New => Fix Released