R. David Murray added the comment:
It seems to me this has been reported before, but I couldn't lay hands on the
issue in a quick search. With this description of the problem and example, I
think I see what is wrong. The folding algorithm is probably trying to handle
the encoded words one by
New submission from Vincent Vanlaer:
Example:
X-Report-Abuse:
=?us-ascii?q?=3Chttps=3A=2F=2Fwww=2Emailitapp=2Ecom=2Freport=5Fabuse=2Ephp=3Fmid=3Dxxx-xxx-?=
=?us-ascii?q?=3D=3D-xxx-xx-xx=3E?=
When this header is parsed and reencoded as bytes using policy.default, the
