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PostmarkApp Email Integrator

by Gagan Deep Singh · Email & Marketing

Also makes 8 other plugins · 65.4K+ installs across the portfolio →

Enables your WordPress site to send emails via PostMarkApp API.

⚠ Few reviews
How scoring works →
82 Health · B
Maintenance 91/100
Rating quality 80/100
Support 70/100

82 health vs 63 average across 1,298 Email & Marketing plugins

Directory ranking optimization

How it's scored →

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

89 / 100

Excellent listing optimization

Biggest win: Rating quality

Update recency 100/100
WP compatibility 100/100
Rating quality 55/100
Listing tuning 100/100

To rank higher: Too few reviews to rank on quality — nudge happy users to leave one.

Get the full rank-higher report →

Daily downloads

Since 2022-10-05 · 1,427 days · wp.org + Plugin Pulse archive

+94% vs prior 30d
-4Downloads · Aug 26

30-day downloads

Rolling 30-day volume · peaks are release surges

93

now · peak 216

8530d downloads · Aug 26

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

PostmarkApp Email In · #20063 you ActiveCampaign Postm · #694 SMTP2GO for WordPres · #938 WPO365 · #1732

Update activity

How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.

1.7Kper 1k installs · Aug 26

Release cadence

Occasionally updated
from wp.org release tags

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

2

releases in the last 12 months

5mo ago

latest release · v2.5.0

8

tagged releases on record

Recent releases

2.5.0 · 5mo ago2.4 · 7mo ago2.3 · 11.8y ago2.2 · 11.9y ago2.1 · 12.0y ago2.0 · 12.0y ago1.1 · 12.0y ago1.0 · 12.0y ago

What its installed base runs

via wordpress.org

Share of active installs on each version of this plugin · 56% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

v2.5 56%
v2.4 44%

Estimated active installs

The public count shows “50+”. Our estimate pins where the real number sits.

tracked estimate
50–60 ≈57

Refined from the date this plugin crossed into its current band.

At the current install trend, crossing 60+ in roughly 219 days.

Install history · since 2016-06-04 · 1,387 observations

50Installs · Aug 26

Estimated value

What this plugin might earn a year, and what it might sell for. Modeled from public signals; we don't see anyone's books.

Est. annual revenue

N/A

Est. acquisition value

N/A

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. A small install base leaves thin data to model from.

Details

Version
2.5.0
Last updated
5mo ago
Added
2014-09-12 · 11 yrs old
Requires WP
5.0
Tested up to
6.9.7
Requires PHP

Recent reviews

All reviews on wp.org ↗
  1. levseltzer
    9.9y ago

    Very satisfied

    Read on wp.org ↗
  2. johnwu
    11.2y ago

    I was randomly getting a WP_Error the “Postmark Approved WordPress Plugin” recently. When I switched to this plugin everything started working again. Thank you!

    Read on wp.org ↗
  3. Simon Blackbourn
    11.3y ago

    Thanks very much for releasing this, it works perfectly. It’s good to see the long-standing problems with the official plugin fixed here.

    Read on wp.org ↗
  4. guillaumemolter
    11.9y ago

    Working and up to date

    Read on wp.org ↗

Known vulnerabilities

via Wordfence Intelligence

3 disclosed vulnerabilities on record for this plugin, all fixed in the current version. Sites on older versions stay exposed until they update.

  1. 2026-02-18 CVE-2026-1043 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 2.4 Patched in 2.5.0
  2. 2025-03-31 CVE-2025-31576 Missing Authorization Affects <= 2.4 Patched in 2.5.0
  3. 2025-03-31 CVE-2025-31617 Cross-Site Request Forgery (CSRF) Affects <= 2.4 Patched in 2.5.0

Vulnerability records provided by Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. License and terms.

CVE records: Copyright 1999-2026 The MITRE Corporation. CVE terms of use.

Behavioral tests

via WP Hive

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0

Low memory footprint
Low page-speed impact
Runs on latest PHP + WP
No PHP errors
No JS errors
Activates cleanly
No resource errors
No external HTTP errors
Optimized database use
Frequently updated

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

  1. 2026-07-10 60+ → 50+ down after 93 days in tier
  2. 2026-04-08 50+ → 60+ up after 54 days in tier
  3. 2026-02-13 60+ → 50+ down after 6 days in tier
  4. 2026-02-07 50+ → 60+ up after 30 days in tier
  5. 2026-01-08 60+ → 50+ down after 47 days in tier
  6. 2025-11-22 50+ → 60+ up after 8 days in tier
  7. 2025-11-14 60+ → 50+ down after 41 days in tier
  8. 2025-10-04 50+ → 60+ up after 1 days in tier

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

Compare head to head →

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PostmarkApp Email Integrator: 50+ active installs, 5.0★ (4 reviews). Plugin Pulse (WP Mayor), as of 2026-08-31. https://plugins.wpmayor.com/plugin/postmarkapp-email-integrator