Canonicalization
DKIM Canonicalization – or – why Microsoft breaks your mail
- steve
- Dec 12, 2016

One of these things is just like the other
Canonicalization is about comparing things to see if they’re the same. Sometimes you want to do a “fuzzy” comparison, to see if two things are interchangeable for your purposes, even if they’re not exactly identical.
As a concrete example, these two email addresses: