Post SMTP vs Email Deliverability (September 2026)
Updated September 7, 2026 · Data from WordPress.org, refreshed daily · How this works
Both rank in the WordPress.org Email Plugins top 10: Post SMTP at #3 and Email Deliverability at #9. Post SMTP leads on 4 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
Post SMTP
Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
Improve WordPress email deliverability. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Mailgun, Zoho, Amazon SES, etc. #1 WordPress SMTP Plugin.
Email Deliverability
Email Deliverability – SMTP Replacement, Email API Deliverability & Email Log
Effortlessly manage transactional emails with Email Deliverability. High deliverability, logs and statistics, and no SMTP plugins needed.
Who leads on what
Post SMTP leads on 4 of the 5 measures we track.
Post SMTP ranks higher on WordPress.org: #3 against #9 in Email Plugins.
Post SMTP has more users: 300,000+ active installs against 200,000+.
Not enough reviews to compare ratings fairly: Post SMTP has 525, Email Deliverability has 16. We compare ratings only above 50 reviews each.
Post SMTP has more reviews behind its score: 525 against 16.
Post SMTP was updated more recently, on August 25, 2026; Email Deliverability on July 16, 2026.
Which one to pick
Each plugin is the better answer for the measure it actually leads on. Nothing here is a recommendation we invented.
Post SMTP
Pick Post SMTP if you go by where WordPress.org itself puts them, you want the plugin more sites already run, you want the score backed by more reviews or you want the one shipping releases most recently.
Email Deliverability
Email Deliverability does not lead on any measure we track, so pick it only for something these numbers cannot show, such as a feature you need.
Post SMTP vs Email Deliverability side by side
| Post SMTP | Email Deliverability | |
|---|---|---|
| Email Plugins ranking | #3 | #9 |
| Rating | 4.7 | 2.3 |
| Reviews | 525 | 16 |
| Active installs | 300,000+ | 200,000+ |
| Total downloads | 20,136,080 | 2,458,348 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 25, 2026 | Jul 16, 2026 |
| First published | Oct 15, 2017 | Sep 16, 2024 |
| Tested up to WordPress | 7.0.4 | 7.0.4 |
| Requires PHP | 7.1 | 7.4 |
| Pricing | Free + paid version | Free on WordPress.org |
30-day download figures appear after both plugins have 30 days of tracking.
Post SMTP ratings
Email Deliverability ratings
How we compare these two
Every figure here is pulled from the WordPress.org plugin API every day at 03:00 UTC, for both plugins in the same run, so the two are always read on the same day. We compare only what the directory reports: active installs, the rating and how many reviews stand behind it, the last release date and, once we have a month of history, downloads over the last 30 days. Ratings are only called a win above 50 reviews each, because a handful of five-star reviews is not evidence. Nothing is weighted into an overall score, no measure is worth more than another, and neither Post SMTP nor Email Deliverability can pay to appear here: the pair exists only because both plugins reached the Email Plugins top 10. Full methodology.
Post SMTP vs Email Deliverability: common questions
Is Post SMTP better than Email Deliverability?
Post SMTP leads on 4 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. Post SMTP ranks higher on WordPress.org: #3 against #9 in Email Plugins.
Which has more users, Post SMTP or Email Deliverability?
Post SMTP ranks higher on WordPress.org: #3 against #9 in Email Plugins.
Which is rated higher, Post SMTP or Email Deliverability?
Post SMTP has more users: 300,000+ active installs against 200,000+.
Are Post SMTP and Email Deliverability free?
Both are free to install from WordPress.org. Post SMTP is listed as commercial, so a paid version or add-ons exist. Email Deliverability may also sell a paid version or add-ons.
Alternatives to Post SMTP and Email Deliverability
Plugins that score close to both in the same WordPress.org rankings and tags.
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- Email Deliverability vs SMTP Mailer
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What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.