ActiveCampaign Postmark for WordPress vs WPO365 | MICROSOFT 365 GRAPH MAILER (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
ActiveCampaign Postmark for WordPress
50K+ active installs
Free
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 ActiveCampaign Postmark for WordPress leads in active installations (50K+ vs 10K+). Both are free WordPress plugins. ActiveCampaign Postmark for WordPress has accumulated 763K+ total downloads while WPO365 | MICROSOFT 365 GRAPH MAILER has 190K+.
Detailed Comparison
| Metric | ActiveCampaign Postmark for WordPress | WPO365 | MICROSOFT 365 GRAPH MAILER | |
|---|---|---|---|
| Rating | 4.7/5 | ► | 4.9/5 |
| Total Reviews | 30 | ► | 37 |
| Active Installs | 50K+ | ◄ | 10K+ |
| Total Downloads | 763K+ | ◄ | 190K+ |
| Support Resolution | 0% | N/A | |
| Last Updated | 1 year ago | ► | 2 days ago |
| First Released | 2011 | 2022 | |
| Age | 15 years | 4 years | |
| WP Requires | 5.3+ | 5.0+ | |
| PHP Requires | 7.0+ | 7.4+ | |
| Business Model | Free | Free | |
| Latest Version | 1.19.1 | 5.1 |
Rating Breakdown
ActiveCampaign Postmark for WordPress
WPO365 | MICROSOFT 365 GRAPH MAILER
Download Trends
Over the past 30 days, ActiveCampaign Postmark for WordPress averaged approximately 111 daily downloads while WPO365 | MICROSOFT 365 GRAPH MAILER averaged 316.
Recent Reviews
ActiveCampaign Postmark for WordPress Reviews
Great plugin, no issues ever
This is extremely reliable, just like Postmark.
Stable and reliable
I switched to using Postmark for a few of my websites email delivery over a year ago, and have not had any issues since. Super reliable, and good support too!
Must have email plugin
Postmark (both the service and this plugin) has resolved and prevented so many headaches. It is an absolute time saver. The customer service is fast, responsive, and helpful. I’ve tried the others—Pos
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 Wp_Mail Worth Comparing
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Frequently Asked Questions
Is ActiveCampaign Postmark for WordPress or WPO365 | MICROSOFT 365 GRAPH MAILER more popular?
Which has better ratings — ActiveCampaign Postmark for WordPress or WPO365 | MICROSOFT 365 GRAPH MAILER?
Are ActiveCampaign Postmark for WordPress and WPO365 | MICROSOFT 365 GRAPH MAILER free?
Which plugin has better support — ActiveCampaign Postmark for WordPress or WPO365 | MICROSOFT 365 GRAPH MAILER?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.