feat!: DKIM verifier (#35)

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* feat!: DKIM verifier

This implements a DKIM verification as well as a strict
DKIM signature alignment check with domain in `From`
header address.

Caches the retrieved RDATA using in-memory LRU.

BREAKING CHANGE: incoming messages now require DKIM signatures
  aligned to domain of the `From` header address.

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

* chore(license): License binaries under GPLv3

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

---------

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

...

This commit is contained in:

Jagoda Estera Ślązak

2026-08-18 12:21:27 +02:00

committed by missytake

parent dc97e85ebe

commit 23074f0898

12 changed files with 2072 additions and 40 deletions

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