Proof you can hand to the other side.
Turn a delivered mail into a signed certificate covering the content hash, DKIM, provider handoff, and delivery events, verifiable in anyone's browser without contacting 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 signature catches any alteration, and the independent timestamp proves the certificate existed when it says it did — not even Mailway can back-date one (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, so there's no need to trust our database, and the timestamp doesn't even trust us. Share the rendered email itself with a private mailway.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
Your mail is ingested, routed, and archived inside the European Union, on dedicated infrastructure in Germany. Not "EU region available". EU, full stop.
Encrypted in transit & at rest
TLS on every SMTP connection, both STARTTLS and implicit TLS. Stored payloads compressed and encrypted at rest.
Your keys only
Pure BYOK. Your mail rides your own provider accounts, never pooled with other Mailway customers. 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, with additional regions on the roadmap as we grow
Your mailer config has
one line to change
Mailway is in private beta, and we onboard teams one at a time. Leave your email and we'll send your invite when it's your turn.