Postmark delivers and tracks application email as an alternative to SMTP or Sendmail. It separates transactional and broadcast messages into different Message Streams and IP infrastructure. Developers can send through a REST API, SMTP, or multi-region SMTP routing, and official libraries cover Node.js, Python, Rails, Ruby, PHP, and .NET. Postmark can also process inbound email into JSON and send it to a webhook URL. Tracking covers delivery, bounces, spam, opens, and links, with event webhooks. Editable responsive templates are available for transactional messages such as password resets, receipts, and invitations. The free Developer plan provides 100 emails per month, has no overages, and never expires. Basic starts at $15.00 per month, billed monthly, and includes 10,000 emails per month; additional email costs $1.80 per 1,000. Unused emails do not carry into the next billing period, and extra paid-plan emails are calculated at the billing-cycle end. Postmark supports web and API access. Basic allows up to four users, while Pro permits up to six and Platform has unlimited users.
Who it is for
Postmark suits developers who need to send and track application email through an API or SMTP. Its inbound processing, templates, and webhooks may also suit teams building email into application workflows.
What is good
- Free plan never expires and allows 100 emails monthly.
- Supports REST API, SMTP, and multi-region SMTP routing.
- Separates transactional and broadcast email infrastructure.
- Inbound email can be delivered to a webhook as JSON.
- Customer success support is included without a premium fee.
What to know first
- The free plan does not allow overages.
- Unused emails do not carry into the next billing period.
- Annual plans are not currently offered.
- Email messages are limited to 10 MB and 50 recipients.
Verdict
Postmark offers application email delivery, tracking, and inbound processing with a permanent but limited free tier. Compare paid-plan email allowances and overage rates, and account for the stated message size and recipient limits.
Postmark plans and pricing
All plansCompared on transactional email software
- Free plan
- Yes
- Paid from
- $15/mo
- Monthly send limit
- $10,000/mo
- Inbound email
- Yes
- Delivery event webhooks
- Yes
- SMTP relay
- Yes
- Email templates
- Yes
- Dedicated IP option
- Yes
