Mailer App routes every message across Mailgun, Gmail and Amazon SES with automatic failover — while a built-in suppression & unsubscribe list keeps your bounce rate low and your sender reputation intact. Built multi-tenant from day one, so it scales with your volume.
Illustrative preview — your dashboard shows real send activity.
Works with the providers you already use
Email providers, one API
Failures before auto circuit-break
Days of attempt history retained
Organizations, fully isolated
No more juggling providers by hand or watching your sender reputation quietly erode.
Mailgun, Gmail, Amazon SES and more — if one provider fails, the next in priority order picks it up automatically.
A global block-list plus self-service unsubscribe links keep bounce rate down and protect your sender reputation.
Multi-tenant from the ground up — every organization is fully isolated, so volume from one never affects another.
Per-organization and per-provider throttling keeps you safely within provider limits, automatically.
An unhealthy provider is automatically paused and retried later — no 3am pages, no manual intervention.
Every send attempt is logged per organization, so you always know exactly what happened to a message.
From API call to inbox, in four steps.
Your app calls one simple endpoint with the recipient, subject and body.
Recipients on the block-list are filtered out automatically — no bounce, no wasted send.
The healthiest available provider is tried first, with automatic failover if it struggles.
Every attempt is recorded, so you always have a full audit trail.
A single bounced address doesn't just fail once — left unchecked, it quietly drags down your domain's reputation with every provider. Mailer App keeps a global suppression list so a bounced or unsubscribed address is never emailed again, from any organization.
Illustrative preview of the suppression list UI.