On Wed, Sep 30, 2026, at 14:25, R. Latimer wrote: > What about minor edits to bodies encoded using base64? How are they > described?
Sensibly, by rewriting the minimum number of lines possible. The tricky part is changing something in the middle of the base64 in such a way that it doesn't align to 3-byte input groups, so the output gets desynchronised. Doing that is almost always a bad idea! We can't just change base64 to include zero-width aligners though :(. There's no good answer with the current recipe design for this. There are solutions, but they're patching the binary representation of each part rather than the encoded representation, and we decided against that in the early stages of discussing this, because it makes things much more complex for validators, they need full MIME parsing instead of just working in terms of lines. Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd / Fastmail US LLC [email protected]
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