Integrates with
account required
Postmark
Postmark sends transactional messages, verifies the 200 with MessageID, stores that ID, and ingests bounce webhooks with signature checks.
Verification: test_verified. Connection: unknown. Credentials: none. Live E2E: no.
Postmark server token is not configured.
What sslcertificates.io can do
Postmark sends transactional messages, verifies the 200 with MessageID, stores that ID, and ingests bounce webhooks with signature checks. Capabilities: send, webhooks, bounces. Authentication uses server_token.
Required permissions
Server token with Send and optionally Bounce webhooks.
Setup
Open Dashboard → Integrations → Postmark. Enter the credentials described on this page. Values are encrypted at rest and never shown again. Run Test connection. Discovery runs only after authentication succeeds. Select a discovered resource. Do not paste opaque IDs unless the provider cannot enumerate them. Perform the certificate or notification action, then confirm the external system matches. Disconnect removes stored credentials and owned test resources created by sslcertificates.io.
Known limitations
Message Stream must allow transactional mail.
Official sources
Fact checked 2026-09-20. https://postmarkapp.com/developer Postmark is a trademark of its owner. sslcertificates.io is not a partner or certified reseller unless a written agreement exists.
Capabilities
Connect
Postmark is a trademark of its owner. sslcertificates.io is not a partner or certified reseller unless a written agreement exists.