> Forget all about "strictly_mime" and "Send Later" That was just to produce the message. You're right, I'm sorry, all we need is your example. Totally off topic: I've only noticed this recently and right now I can't work out why this particular profile suddenly prefers QP over 8bit and exposes the bug. The code that picks the CTE is here: https://searchfox.org/comm-central/rev/d0e849e295a3acdd98d3201ecb3bbff3b15007c6/mailnews/compose/src/nsMsgAttachmentHandler.cpp#298
Bug 1689804 Comment 10 Edit History
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> Forget all about "strictly_mime" and "Send Later" That was just to produce the message. You're right, I'm sorry, all we need is your example. Totally off topic: I've only noticed this recently and right now I can't work out why this particular profile suddenly prefers QP over 8bit and exposes the bug. The code that picks the CTE is here: https://searchfox.org/comm-central/rev/d0e849e295a3acdd98d3201ecb3bbff3b15007c6/mailnews/compose/src/nsMsgAttachmentHandler.cpp#298 EDIT: Found it: mailnews.wraplength set to 0 will trigger QP. I feel like a fool now :-( - Let me obsolete everything irrelevant here.