>>MTAs should not mess with existing headers at all. I disagree. If a header is >>syntaxically incorrect, or theres something other wrong with it **AND** it >>can be fixed in a reliable way, then fix it, instead of rejecting the >>mail.Rejecting should only be last resort, when the problem CANNOT be >>fixed."reliable way" = a way that ensures you never ever "fix" a correct >>header in a way that makes it incorrect, and also fix any related headers.For >>example, replacing Date: with a Date: header containing server time, isn't >>wrong.Deleting characters from the subject which isn't part of codepage and >>creates garbled text in MUAs (or even outright crash MUAs) are also okay.
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