I do not think of a reason, other than to trigger the workaround you mentioned in the documentation part of the patch, why any sane user would want to send a patch as HTML. This configuration variable sounds more like "imap.forceThunderbirdToSendNonFlowedTextByExploitingItsBug" than "imap.html", in other words. What worries me the most is if there is any guarantee that this bug you are exploiting to force it to send a patch in the common denominator format _will not be fixed_ in future versions of Thunderbird. I see your patch deals only with ampersand, less-than, greater-than and dquot. Do you know if this is enough, or would letters outside US-ASCII need to be expressed in ampersand-hash "character reference" notation? -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html