Module canonical 

Canonical email keys for binding and verification lookups.

Canonicalization splits on the final at sign, lowercases both components, and expands the German sharp s. It does not otherwise normalize mailbox or domain syntax.

Constants

MAX_EMAIL_LEN 🔒

Upper bound on an email address length, applied before canonicalization so a pathological input cannot drive unbounded work.

Functions

canonicalize_email

Canonicalizes an email address for storage and matching.

case_fold 🔒

Applies the service’s per-character email case fold.