Postal
Postal — Open-source self-hosted mail server and transactional email platform with SMTP and HTTP API.
Our Verdict
Viable self-hosted transactional mail for teams committed to mail ops; painful otherwise.
Pros
- Full open-source SMTP + HTTP API server
- Self-hosted means no per-email SaaS fees
- Good choice for EU data residency needs
- Web UI for managing messages and queues
Cons
- Running your own IPs hurts deliverability early
- Requires ongoing abuse/reputation management
- Less polished than Postmark or SES
- Community maintenance, no SLA
Best for: Privacy-focused teams with SRE capacity to manage mail servers
Not for: Product teams who just want a reliable email API
When to Use Postal
Good fit if you need
- Self-hosted transactional email server for full data control
- SMTP relay for a SaaS app without relying on third-party ESP
- Open-source Mailgun alternative on owned infrastructure
- HTTP API email sending integrated with a self-hosted stack
- High-volume mailing list on own servers for privacy compliance
Lock-in Assessment
Low 5/5
Lock-in Score 5/5
Pricing
Price wrong?Postal Pricing
- Pricing Model
- free
- Free Tier
- Yes
- Entry Price
- —
- Enterprise Available
- No
- Transparency Score
- —
Beta — estimates may differ from actual pricing
1,000
1001K10K100K1M
Estimated Monthly Cost
$25
Estimated Annual Cost
$300
Estimates are approximate and may not reflect current pricing. Always check the official pricing page.
Community Discussion
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