SMTP Mailer vs WPO365 | MICROSOFT 365 GRAPH MAILER (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
WPO365 | MICROSOFT 365 GRAPH MAILER
10K+ active installs
Free
Quick Verdict
As of April 2026, WPO365 | MICROSOFT 365 GRAPH MAILER has a higher user rating (4.9/5 from 37 reviews) while SMTP Mailer leads in active installations (70K+ vs 10K+). Both are free WordPress plugins. SMTP Mailer has accumulated 1.4M+ total downloads while WPO365 | MICROSOFT 365 GRAPH MAILER has 190K+.
Detailed Comparison
| Metric | SMTP Mailer | WPO365 | MICROSOFT 365 GRAPH MAILER | |
|---|---|---|---|
| Rating | 4.5/5 | ► | 4.9/5 |
| Total Reviews | 65 | ◄ | 37 |
| Active Installs | 70K+ | ◄ | 10K+ |
| Total Downloads | 1.4M+ | ◄ | 190K+ |
| Support Resolution | N/A | N/A | |
| Last Updated | 1 month ago | ► | 3 days ago |
| First Released | 2015 | 2022 | |
| Age | 11 years | 4 years | |
| WP Requires | 6.9+ | 5.0+ | |
| PHP Requires | false+ | 7.4+ | |
| Business Model | Free | Free | |
| Latest Version | 1.1.25 | 5.1 |
Rating Breakdown
SMTP Mailer
WPO365 | MICROSOFT 365 GRAPH MAILER
Download Trends
Over the past 30 days, SMTP Mailer averaged approximately 449 daily downloads while WPO365 | MICROSOFT 365 GRAPH MAILER averaged 354.
Recent Reviews
SMTP Mailer Reviews
A basic and effective plugin. The best.
For my WordPress site, I didn’t want complex plugins with lots of options or that consumed a lot of resources. I was looking for something simple. At first, it didn’t work well because it wasn’t 10
Simple Setup, Works Great with CF7
I’ve tried some of the better-known ‘big name’ SMTP plugins, but none of them did exactly what I needed with CF7 sending both Mail and Mail (2) seamlessly. This one just works with no complications or
Simple needs, simple to use
I needed something quick and easy when a contact page on an old site started breaking for some reason and I decided to redo it with new plugins for the form and mailer. This plugin got me going and fi
WPO365 | MICROSOFT 365 GRAPH MAILER Reviews
Outstanding Plugin
My problems with Microsoft 365-Account sending were solved by the plugin in a minute. Ok, you have to go trough that Microsoft Azure registration routine, but then it rocked! Other plugins didnt do th
Very good solution for a free option
It works as expected and is currently a strong option for enabling the Microsoft Graph API without a monthly subscription. The setup steps for connecting your Microsoft SMTP account are well documente
A great and fast solution
Seamless solution to send emails via Graph. The ease of setup is imply wonderful.
More Phpmailer Worth Comparing
Top alternatives in the same category as SMTP Mailer and WPO365 | MICROSOFT 365 GRAPH MAILER
Zoho Mail Plugin lets you configure your Zoho Mail account on your WordPress site enabling you to send the email via Zoho Mail API.
Fixes WordPress emails going to spam/junk folders. The default settings often resolve the issue.
Configure SMTP mailing in WordPress, including support for sending email via SSL/TLS (such as Gmail).
Zoho ZeptoMail Plugin lets you configure your ZeptoMail account on your WordPress site enabling you to send transactional emails of your site via Zept …
Simple plugin that correctly sets the return-path header when using wp_mail. Mitigates the "via" and "The actual sender of" Notif …
A friendly SMTP plugin for WordPress. No third-party, simply using WordPress native possibilities.
Frequently Asked Questions
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.