On Fri, Jun 9, 2023 at 8:49 AM Alessandro Vesely <ves...@tana.it> wrote:
> On Fri 09/Jun/2023 16:07:07 +0200 Murray S. Kucherawy wrote: > > And signing software shouldn't be mutating messages ever (other than > adding > > signatures, of course). > > Section 5.3, Normalize the Message to Prevent Transport Conversions, gives > different advice. UTF-8, though, seems to be subject to mutating > fashions; > conversion to 7-bit form, IMHO, makes sense only if it is base64. Quoted > printable is messy and prevents recovery after MLM transformation. > You were previously talking about inserting ">" before a line starting "From ", which is typically done on delivery when writing to an mbox-formatted mailbox file, because in that format, "From " at the front of a line has a specific meaning (i.e., "this is a new message"). If that insertion is happening in transport, then a local mailbox convention is leaking out into the transport environment, which means something is misconfigured, and all bets are off. In any case, it is not a transport conversion anticipated by the section you're quoting, so I've no idea why a DKIM signer might opt to handle it specially. -MSK, participating
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