The settings
SMTP hostsmtp.postmarkapp.com
Port587 (STARTTLS)
Username / passwordyour Server API token (both fields)
Setup, step by step
- 1.In Postmark: create a Server, then Sender Signatures → add and DKIM-verify your domain.
- 2.Copy the Server API token — it's both SMTP username and password.
- 3.Postmark separates transactional and broadcast Message Streams; pick the stream that matches what your automation sends.
- 4.In FrazzleCRM: Settings → Credentials → Add SMTP with the values above; test-send.
Deliverability in one line: SPF + DKIM on your domain, warm up gradually, and let FrazzleCRM's broken-link watchdog catch dead links before subscribers do.
Common questions
Can I send marketing email through Postmark?
Yes, via their Broadcast message streams — keep promotional sequences on a broadcast stream so their famously-clean transactional IPs stay that way.