npm · npm:postmark

postmark active

Official Node.js client library for the Postmark HTTP API - https://www.postmarkapp.com

The latest stable version of postmark is 5.1.1, published on 2026-11-10. Verified by Vigia on 2026-11-12.

Latest stable version	5.1.1
Published	2026-11-10 21:09:31 UTC
Install	`npm install postmark@latest`
Requires (engines)	`{"node":">=18.0.0"}`
Peer dependencies	—
Dist-tags	`latest: 5.1.1`
License	MIT
Advisories on latest version	none known
Last verified	2026-11-12 12:41:57 UTC
Sources	api.deps.dev, registry.npmjs.org, registry.npmjs.org

Maintenance

Activity	active
Last stable release	2026-07-10 15:04:37 UTC · 125 days ago
Stable releases in the last 12 months	3
Published versions	91

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

Version	Published
`5.1.0`	2026-07-10 15:04:37 UTC
`5.0.0`	2026-07-08 17:39:08 UTC
`4.0.7`	2026-02-18 21:21:31 UTC
`4.0.5`	2024-08-19 11:32:33 UTC
`4.0.4`	2024-06-20 16:06:40 UTC
`4.0.3`	2024-06-20 15:51:23 UTC
`4.0.2`	2023-12-04 13:43:44 UTC
`4.0.1`	2023-12-04 12:31:03 UTC
`4.0.0`	2023-12-04 10:48:36 UTC
`3.11.0`	2023-11-14 11:35:56 UTC
`3.1.2`	2023-11-02 12:59:40 UTC
`3.1.1`	2023-10-09 15:56:10 UTC
`3.1.0` withdrawn	2023-10-09 12:43:43 UTC
`3.0.20`	2023-10-09 11:04:45 UTC
`3.0.19`	2023-07-31 13:30:42 UTC
`3.0.18`	2023-05-02 14:55:19 UTC
`3.0.17`	2023-04-25 12:10:59 UTC
`3.0.16` withdrawn	2023-04-25 11:46:11 UTC
`3.0.15`	2022-12-13 15:06:55 UTC
`3.0.14`	2022-08-29 11:59:31 UTC

Showing the 20 most recent of 91 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`node 16`	`4.0.7`
`node 18`	`5.1.0`
`node 20`	`5.1.0`
`node 22`	`5.1.0`
`node 24`	`5.1.0`

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Frequently asked questions

What is the latest version of postmark?

The latest stable version of postmark is 5.1.1, published on 2026-11-10. Verified by Vigia on 2026-11-12.

How do I install the latest version of postmark?

Run npm install postmark@latest. The latest stable version is 5.1.1 (verified 2026-11-12).

Is postmark deprecated?

No. postmark is not marked as deprecated in the registry.

Which Node.js version does postmark require?

postmark 5.1.1 declares this requirement: {"node":">=18.0.0"}.

Does postmark 5.1.1 have known vulnerabilities?

No known advisories affect postmark 5.1.1 according to the data Vigia checks.

Is postmark still maintained?

postmark published 3 stable releases in the last 12 months; the most recent was 125 days ago. Activity: active.

Observed changes

Wed Nov 11 2026 12:41:10 GM +0000 (Coordinated Universal Time) — released 5.1.1 → 5.1.1
ue Nov 10 2026 22:40:39 GMT+0000 (Coordinated Universal Time) — released 5.1.0 → 5.1.1

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