Proof you can hand to the other side.
Turn any archived mail into a signed certificate — content hash, DKIM, provider handoff, delivery events — verifiable in anyone's browser, without trusting us.
When a recipient insists an email never arrived — or arrived saying something else — the argument is usually memory against memory. A proof-of-delivery certificate ends it: Mailway binds the message's SHA-256 content hash, its original DKIM signature, the provider handoff, and the provider's delivery events into one Ed25519-signed document with an RFC 3161 timestamp.
Certificates verify offline — the other side doesn't have to trust Mailway's servers, or Mailway at all (how verification works). The rendered email itself can be shared through a private, expiring mailway.to link, so a dispute is settled by showing the artifact instead of describing it.
of Delivery
"I never got that email."
Here's the receipt.
Every message is archived with its raw MIME and original DKIM signature, and can be turned into an Ed25519-signed proof-of-delivery certificate, countersigned by an independent time authority so it can't be back-dated. The signature verifies in anyone's browser — no need to trust our database, or us. Share the rendered email itself with a privatemailway.to link, and settle the dispute instead of having it.
90 days on Pro, 6 months on Team, 1 year on Business, unlimited on Enterprise — with 3-to-7-year add-ons for SOX, HIPAA, and FINRA record-keeping. All of it EU-hosted, all of it searchable.
Your email stays
on European soil
EU data residency
Ingested, routed, and archived inside the European Union, on dedicated infrastructure in Germany. Not "EU region available" — EU, full stop.
Encrypted end to end
TLS on every SMTP connection — STARTTLS and implicit TLS. Stored payloads compressed and encrypted at rest.
Your keys only
Pure BYOK. Mailway never sends from shared IPs, so nobody else's spam problem can ever become yours — your reputation stays yours.
Proven in production
5+ years of real customer volume, 865,000+ messages, 99.6% provider-accept rate. Not a weekend project.
one EU region today — additional regions on the roadmap as we grow
Your mailer config has
one line to change
Mailway is in private beta — we onboard teams one at a time. Leave your email and we'll send your invite when it's your turn.