Show HN: Milter in Rust to Add Headers
2 by wagoYYP | 0 comments on Hacker News.
Here's a milter in Rust that adds List-Unsubscribe headers. It creates a URL that has encoded email-from, rcpt-to and a HMAC SHA 256 verification hash using a shared secret key. Possibly it improves delivery of newsletters and transactional emails.