Postmark is a transactional email service with an unusual focus: it only accepts transactional email (receipts, notifications, password resets, alerts) and refuses bulk or marketing email. This separation keeps shared infrastructure clean, resulting in consistently industry-leading inbox placement rates that make Postmark the preferred choice for product teams where email deliverability is business-critical.
Product Overview
Postmark's dedicated transactional infrastructure means your product emails never share reputation with bulk marketing campaigns. Its average delivery time (under 1 second) and 99%+ inbox placement rate are the highest consistent benchmarks in the category. Message Streams allow teams to separate different email types (transactional, outbound, broadcasts) within a single account, with separate sending pools, bounce tracking, and analytics per stream. DMARC compliance, DKIM signing, and bounce management are all handled automatically.
Key Features
- Sub-Second Delivery: Average email delivery under 1 second — critical for time-sensitive transactional emails like OTPs and alerts.
- Message Streams: Separate sending pools for different email types — each with independent reputation, analytics, and bounce management.
- Bounce Management: Automatic bounce processing with categorised bounce types and suppression lists to protect sender reputation.
- Email Activity Feed: Real-time feed of every email event — sent, delivered, opened, bounced — with 45-day searchable history.
- DMARC Compliance: Automatic DKIM signing and SPF management — Postmark handles the technical email authentication layer for you.
Best For
Product and engineering teams at SaaS companies where transactional email delivery speed and inbox placement are business-critical — particularly authentication emails, notifications, and time-sensitive alerts.
Pricing
From $15/month (10K emails). Scales to $4.95/10K at volume. Predictable per-email pricing — no monthly subscriber fees.
Key Integrations
REST API, SMTP, Zapier, WordPress, Ruby on Rails, Laravel, Django, Node.js, PHP
Pros
- Highest consistent inbox placement rate in the category
- Sub-second delivery is genuinely best-in-class
- Transactional-only policy keeps shared infrastructure clean
- Transparent, predictable pricing per email
Cons
- No bulk or marketing email — use SendGrid or Mailgun for that
- No visual email builder — API and templates only
- 45-day activity log limit (longer history requires export)
