Your providers, behind one endpoint.
Connect the accounts you already have and order the chain. A timeout or an empty credit balance becomes a reroute instead of a missing email.
Email provider failover means a timeout, rate limit, or exhausted account at one provider doesn't stop your mail: the gateway reads the error, classifies it, and reroutes the message to the next provider in your chain automatically, mid-send. Hard bounces are the exception. Those are suppressed instead of retried, so a bad address never hurts your sender reputation twice.
Each project picks one of four routing strategies: failover, free-first, round-robin, or random, over the provider accounts you already own (supported providers). Free-first spends each provider's free tier before a single paid send; the calculator below shows what that does to a monthly bill.
Providers fail.
Your email shouldn't.
Your app hands off once, gets 250 OK, and moves on. Mailway reads whatever the provider says back: a timeout, a rate limit, an empty credit balance. Then it reroutes in milliseconds. Here's a genuinely bad day, handled without a single page going out:
Four routing strategies
Primary provider first. On timeout, rate limit, or outage, the next one takes over automatically with exponential backoff.
Spend every provider's free tier before a single paid send. Paid rates only kick in once the free capacity is gone, and exhausted providers stay available for failover.
Distribute volume evenly across providers. Balance spend, spread sender reputation, and stay under per-provider rate limits.
A coin flip per message. For when you want the volume spread and nothing else to think about.
Not all errors are equal
Hard bounces are never retried. The address goes straight to your suppression list, where it stops hurting your sender reputation. Everything recoverable fails over. Nothing gets retried into a blocklist.
Drag the slider.
Watch the savings.
The free-first routing strategy fills every provider's free tier before a single paid send. A paid rate only kicks in once all the free capacity is spent. You pay providers directly at their prices, and Mailway takes zero margin on delivery, because we never touch it.
provider free tiers as documented · you pay providers directly · mailway never marks up provider cost
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.