RAPID SMTP vs Postmark
Postmark specialises in transactional email with industry-leading deliverability. RAPID SMTP focuses on campaign-style bulk email and works alongside Postmark for transactional sends.
Published January 15, 2026 · By RAPID SMTP
Postmark specialises in transactional email with industry-leading deliverability. RAPID SMTP focuses on campaign-style bulk email and works alongside Postmark for transactional sends.
Side-by-side comparison
| RAPID SMTP | Postmark | |
|---|---|---|
| Setup time | Paste any SMTP credentials | Domain + DKIM verification |
| Pricing | Flat ৳59–৳1,649/month | $15 per 10,000 emails |
| Free tier | Yes | 100 emails/month test |
| Bring your own SMTP | Yes | No |
| Campaign manager | Yes — full campaign manager | Broadcast add-on (separate UI) |
| Open & click tracking | Yes | Yes |
| API | REST + SMTP | REST + SMTP |
| Region & billing | Bangladesh | US, USD |
Where RAPID SMTP wins
- RAPID SMTP gives you marketing campaigns Postmark doesn't ship by default.
- Use Postmark for receipts and password resets, RAPID SMTP for newsletters — one contact database.
Where Postmark wins
- Postmark's transactional-only IPs and deliverability scoring are world-class — keep them for transactional.
Verdict
Split the workload. Postmark = transactional, RAPID SMTP = bulk + newsletters. The total cost is still lower than any all-in-one US marketing platform.
Other comparisons
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Connect your own SMTP and send bulk email starting at $0.59/month.