/ Plugin Category

/ Communication & Messaging

/ Transactional Email

/ Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App

Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App

By Saad Iqbal

Communication & Messaging / Transactional Email

Reviewed by Abdul Hameid

Trusted WordPress expert with 20+ years of experience evaluating plugins for the WP ecosystem.

Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App Review - In-Depth Analysis

Post SMTP is a powerful WordPress SMTP plugin that enhances email deliverability. It supports various SMTP services like Gmail, Microsoft 365, and more. Features include detailed email logs and a mobile app.

Performance Overview

WPS Score

7/10

User Rating

4.7/5 (based on 528+ reviews)

Active Installations

300,000+

Update Frequency

Outstanding It is calculated using the weighted average of same category plugins.

Security Score

7.82 / 10 (High Risk) It is calculated using the weighted average of all versions.

What It Does

Post SMTP is a complete SMTP solution designed to improve your WordPress email deliverability. With support for popular SMTP services such as Gmail, Microsoft 365, Brevo, and Amazon SES, this plugin ensures that your emails reach their intended recipients without being marked as spam.

The plugin features a user-friendly setup wizard that simplifies the configuration process, allowing you to replace the default PHP mail function with a reliable SMTP mailer. It provides detailed email logs to track delivery status and offers instant failure notifications to keep you informed.

Additionally, the Post SMTP mobile app allows you to monitor your email performance on the go, making it easy to resend failed emails and troubleshoot issues. With advanced features available in the Pro version, you can unlock even more functionalities to enhance your email management.

Comparing to Alternatives

Post SMTP competes in a crowded field of SMTP and email deliverability plugins. Its standout features are email logging, a backup SMTP connection, and a mobile app for monitoring, but its repeated security track record sets it apart from rivals in a less favorable light.

Top alternatives

Strengths

Detailed email logging with delivery troubleshooting
Backup/fallback SMTP server support for redundancy
Mobile app for monitoring email delivery on the go
Widely praised, responsive customer support team
Works well on multisite networks

Weaknesses

Long history of repeated, sometimes critical, security vulnerabilities
Larger plugin file size compared to leaner alternatives
Some premium features gated behind confusing or undisclosed pricing (e.g. Office 365)
Admin UI intrusions like banner ads and unsolicited menu items reported by users

User Sentiment Analysis

With 525 ratings, Post SMTP holds a strong 4.7/5 average and 90.5% five-star reviews, reflecting broad satisfaction with its core features and support. However, a notable 7.2% of reviews are 1-2 star, and several of these raise serious, recurring concerns rather than minor gripes.

Positive highlights

"The built-in email log has saved me multiple times when troubleshooting delivery issues" — gregersen1
"Post SMTP does! [work on multisite]... he was so patient... I made the right choice in Post SMTP" — aprilynnw
"The customer support is fast and very helpful, excellent service!" — decupe
"PostSMTP is hands-down the best of its kind in the Wordpress world" — Michael
"I've never tried something so seamless and quick. Without clutter, no ads, secure and fast" — webdevsam

Common complaints

Recurring critical and high-severity security vulnerabilities causing loss of trust and past site hacks
Undisclosed or unclear pricing for premium features like Office 365 support
Large plugin file size seen as bloated compared to competitors
GDPR concerns over automatically emailing the admin's address without explicit opt-in
Unsolicited admin menu items and persistent banner ads that can't be dismissed
Database errors after updates requiring rollback with no clear fix

Weaknesses

24 recorded vulnerabilities historically, including multiple critical (CVSS 10) account takeover and authorization bypass issues
Pattern of vulnerabilities recurring across many versions rather than being an isolated incident
Intrusive admin UX elements (banners, menu items) reported by multiple reviewers
Some premium pricing not transparently disclosed upfront

Who Should Use This?

Best for

Site owners who need detailed email logging, a backup SMTP fallback, and are willing to stay diligent about updates will find Post SMTP's feature set and support team genuinely valuable, especially for multisite setups or troubleshooting delivery issues.

Not ideal for

Security-conscious administrators managing multiple client sites, or anyone who cannot commit to prompt patching, should think carefully given the plugin's long history of critical vulnerabilities, including past account takeover exploits. Users sensitive to GDPR compliance or intrusive admin UI elements may also want to look elsewhere.

Pricing & Value

Free version includes

The free version offers core SMTP configuration, email logging, backup SMTP server support, and basic delivery troubleshooting tools, which many reviewers say already outperforms other free SMTP plugins.

Pro version (39.99 - 349.99 USD / year)

Premium tiers typically unlock advanced features such as extended log retention, additional connector integrations (including Office 365, which some reviewers found had undisclosed recurring costs), priority support, and enhanced monitoring via the mobile app.

Final Verdict

Post SMTP earns its strong overall rating through genuinely useful features like detailed logging, backup SMTP delivery, and support that reviewers repeatedly praise as fast and knowledgeable. For everyday troubleshooting and multisite deployments, it clearly delivers real value that keeps long-term users loyal.

That said, the plugin's extensive vulnerability history, including multiple critical account takeover flaws, is a legitimate red flag that some reviewers explicitly cite as a reason for lost trust. Combined with complaints about admin bloat, unclear premium pricing, and GDPR-adjacent email practices, cautious users managing sensitive or multiple sites should weigh these risks against alternatives like FluentSMTP or SureMail before committing, and ensure rigorous update discipline if they proceed.

Other Notable Features

Here are a few other notable features of this free Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App plugin.

Email logs

Gmail smtp

Office 365

Smtp

Screenshots

FAQ

A modern replacement for traditional password-based authentication. Post supports the OAuth 2.0 implementations of all three major e-mail providers: Gmail, Office365, Brevo, Mailgun, Hotmail and Yahoo Mail.

Contributors and developers

“Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App” is open source software. The following people have contributed to this plugin.