KaiMail Reviews โ Discover what people think of this product.
KaiMail
Custom domain emails, Simplified
KaiMail is a SaaS email forwarding and sending service for custom domains. Built by an email infrastructure veteran, it lets developers and businesses receive, send, and automate email without running a mail server. Differentiators include ARC signing for reliable deliverability, native webhooks for app integrations, SMTP/HTTP API sending, and bounce tracking.
Flat JPY pricing, bilingual UI, and a free tier make it ideal for small teams and indie developers.
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What does KaiMail help with?
KaiMail solves the problem every developer faces: you buy domains for side projects, but setting up email for them means either running a mail server or paying per-user fees for Google Workspace.
We built KaiMail on patched qmail with full ARC/DKIM/SPF authentication โ the only forwarding service that implements ARC signing, which keeps forwarded emails out of spam as Gmail and Yahoo enforce stricter DMARC policies.
Key features
- Email forwarding & sending on your own domain
- Native webhooks โ HTTP POST on every incoming email, no code required
- SMTP or HTTP API for sending from desktop clients or your app
- Bounce tracking with dynamic MAIL FROM
- Multiple forwards
- Easy email list creation
We also have a special program for OSS developers and open-source community organizers to use their own domains.
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