Get Canonicalization Right
— Use our DKIM parser to inspect your signature settings.
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Why does canonicalization matter (simple vs relaxed)?
- Canonicalization tells DKIM how to treat small formatting changes. There are two modes:
- simple
- relaxed
- Simple breaks signatures easily. Relaxed tolerates small changes such as extra spaces or line wrapping.
- Relaxed is recommended because some mail systems reformat messages during transit.
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