Simple SMTP is the #74 ranked email app on WordPress, with a 5.0 average rating from 11 reviews, as of Aug 31, 2026.
Simple SMTP is a WordPress Plugin Directory app by Casey. With a rating of 5.0★ from 11 reviews, it currently ranks #74 in the Email category.
AppRanks data: Simple SMTP ranks #74 in Email on WordPress Plugin Directory, placing it in the top 11% of that category.
AppRanks verdict
Generated from live marketplace data — refreshed daily
Simple SMTP is a category-leading WordPress app with a limited review volume. It is listed in the Email category on WordPress Plugin Directory, which AppRanks treats as the canonical taxonomy node for ranking and competitor comparison. 11 reviews put it in the early-traction tier — useful for early-stage stores willing to be on the leading edge. Early-traction review counts are sensitive to single launch periods or feature events, so a 30-day re-check before bigger commitments often resolves whether the trend is sustained. Paid-only pricing means evaluating fit on the marketplace listing or via the developer's documentation before installing. AppRanks tracks rating, review count, pricing tier, and category position daily — the figures on this page reflect the most recent scrape from the canonical WordPress Plugin Directory listing.
Pros
- +High average rating (5.0★) signals consistent merchant satisfaction
- +Published by Casey — established developer track record
Cons
- −Limited review base (11) — ratings can shift significantly with new feedback
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How Simple SMTP works
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Adds a simple, no-fuss SMTP settings to your WordPress installation that lets you define custom settings, which is especially useful for hosts with no control over the php mail functionality.
If logging is enabled, a new segment in the settings panel will show up with a 30-day overview of recent emails, and will automatically prune older logs. Please see the FAQ if you want a more permanent solution.
For more information, please see the project wiki on GitHub.
Environment and constant overriding (optional) This plugin will prefer environmental and constant-stored values over the plugin-saved equivalent settings, making it easier to use this plugin via deployment.
These can be either stored in your systems env setup, or in wp-config.php as define( 'SEE_BELOW', 'your_value_here' );.
Accepted Parameters
SMTP_HOST (string) Mail server hostname.
SMTP_PORT (integer) Port address (usually 25, 465 or 587).
SMTP_AUTH (integer, 1 or 0) Pass below credentials to your mail server.
SMTP_USER (string) The mail username for this account.
SMTP_PASS (string) The password for the mailer account.
SMTP_FROM (string) Enforce all emails come from this email address.
SMTP_FROMNAME (string) Enforce all emails to have a certain email name.
SMTP_SEC (string) Use a particular email security method (accepts ‘def’ (default), ‘ssl’, ‘tls’ and ‘off’).
SMTP_NOVERIFYSSL (boolean) Disable validation of the SMTP server certificate (not recommended).
SMTP_LOG (boolean) Controls the logging capability and visibility.
SMTP_DISABLE (boolean) Disables the mailer. They will still be logged if enabled, but won’t send out.
It is recommended to store at least SMTP_PASS in your wp-config.php file (with the correct file permissions set). If the openssl extension is available, the plugin will attempt to encrypt the password in the database.
Category rankings
As of Sep 4, 2026- Email#74of 718Top 11%
See 90-day rank history for each category
Track daily rank changes, category shifts, and position volatility.
Keyword rankings
Simple SMTP ranks for 1 keywords across WordPress Plugin Directory. Here are the top 1:
- 1.faqRank #390
Competitors & alternatives
Simple SMTP doesn't have curated competitor matchups yet. Other tracked email apps on WordPress:
Where Simple SMTP stands in the Email category
Simple SMTP ranks #74 of 718 apps in the Email category, placing it in the top 11% of the listing.
Frequently asked questions
What is Simple SMTP?
Simple SMTP is an app for WordPress. It currently holds a 5.0-star rating from 11 merchant reviews, and AppRanks has been tracking its public marketplace data on the refresh cadence published in our methodology. It is listed under the Email category on AppRanks, where you can see its current category position, review-velocity trend, and how it compares against the top alternatives in the same space. Developed by Casey.
Who uses Simple SMTP?
Currently around 2,000 active stores have installed Simple SMTP. Its review base is still building, which usually maps to early-stage merchants and stores piloting a new workflow. It is part of the Email category on WordPress.
Where does Simple SMTP rank on WordPress?
Simple SMTP currently sits at position #74 in the Email category on WordPress. That places it in the top 10% of 718 apps tracked in the same category. Category positions are read from the live marketplace ranking and refresh on each scrape, so the number you see here reflects the most recent crawl rather than a long-running average.