The parts around sending you'd otherwise build.
Suppression lists, webhooks, scheduling, team roles, the audit log, and a sandbox, next to the four pillars.
Some of these start at a tier, and each card below says which: scheduled sends on Pro and up, manual suppressions on Pro and up, cost analytics on Team and up, and the audit log on Business and up (the full plan matrix).
Everything below is live unless marked otherwise; the "soon" tags mean exactly that. The product overview walks the pillars themselves, and the docs carry each feature's full contract.
Also in the box
The operational pieces around sending, already built. None of them changes how your app sends email.
Sent folder
A byte-for-byte archive of every email your app sends: over SMTP, the raw MIME with its original DKIM signature; over the API, the request exactly as submitted. Search by subject, sender, recipient, or state.
Delivery history
Every attempt, provider answer, and delivery event on one timeline, with SMTP session logs (credentials redacted) and per-project analytics. Reported bounces and complaints fill per-project suppression lists.
Proof of delivery
On Business and up, an Ed25519-signed proof-of-delivery certificate binds the message's SHA-256 hash, its DKIM signature (SMTP mail), the provider's acceptance, and any delivery events the provider reported, and verifies offline with standard tools.
Automatic failover & routing
Fallback for reliability: SendGrid refuses, Amazon SES takes it. Free-first for cost: providers with free allowance left go first, counted approximately. Your strategy, your choice.
Bring your own keys
Plug in your accounts at Amazon SES, SendGrid, Mailgun, Postmark, Mailtrap, Brevo, Mandrill, Resend, Mailjet, MailerSend, Nuntly, SMTP2GO, Gmail, Microsoft 365, SparkPost, Elastic Email, Zoho ZeptoMail, or any SMTP server. Mailway never sends from shared infrastructure.
Development sandbox
Point dev at smtp.mailway.dev — emails are captured and held without delivery. Inspect, debug, release, or discard from the console. Built-in staging.
Unlimited share linksPro+
Share any sent email via a private mailway.to link. Unguessable tokens that expire (up to 4 days), optional password.
Proof-of-delivery certificateBusiness+
Ed25519-signed certificate — content hash, provider acceptance, delivery event, RFC 3161 timestamp — that verifies offline with standard tools.
HTTP send API
REST endpoint with bearer auth, idempotency keys, and batch send. Live for production keys, with a sandbox host for test keys.
DKIM signature validationPro+
Mailway checks the sender's DKIM signature on every mail it relays, shortly after receiving it, and shows the verdict in the console. A pass means the sender's own domain signed those exact bytes.
Suppression lists
Auto-populated from hard bounces and complaints on every plan. Manual add from the console on Pro and up; un-suppress anytime.
Pause, resume & retry
Halt delivery per project instantly and release when ready; one-click retry of any failed send on Pro and up.
Two-factor authentication
TOTP and WebAuthn passkeys with recovery codes, plus team-wide 2FA enforcement.
Every port, every cloud
All 7 SMTP ports open with TLS — works on GCP, AWS, Azure, and restrictive networks.
Provider integrations
First-class API + SMTP bridges for 12 providers, Gmail and Google Workspace over SMTP, plus a generic relay for any SMTP server.
Long-term retention
30 days on Free to 1 year on Business, custom on Enterprise, with multi-year add-ons for SOX, HIPAA, and FINRA record-keeping.
Audit logBusiness+
Audit trail of every security-sensitive change, with four roles and per-project access control.
Domain-based routingTeam+
Route @gmail.com through SES, @outlook.com through SendGrid. Rules, no code.
Outbound webhooks
Signed, retried webhooks for delivery events, with a visible delivery log and one-click redelivery.
Provider cost analyticsTeam+
Estimated spend per provider: your real volume priced at each provider's list rates.
Email schedulingPro+
Accept an email now, deliver it later at a specific UTC timestamp.
Full-text searchsoon
Search across email content, not just metadata — find any message by what's inside.
Your mailer config has
one block 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.