
SMTP.com Security & Risk Analysis
wordpress.org/plugins/smtpcomSMTP.com is a powerful and reliable SMTP delivery service that enables you to send and track high volume emails effortlessly.
Is SMTP.com Safe to Use in 2026?
Generally Safe
Score 100/100SMTP.com has no known CVEs and is actively maintained. It's a solid choice for most WordPress installations.
The "smtpcom" plugin v1.0.0 presents a mixed security posture. On the positive side, the plugin demonstrates good practices regarding SQL queries, utilizing prepared statements exclusively, and showing a high percentage of properly escaped output. The absence of file operations and external HTTP requests, along with no recorded vulnerability history, are also encouraging signs. However, significant concerns arise from the attack surface analysis. With three identified AJAX handlers, all three lack authentication checks, creating a direct avenue for potential unauthorized actions. The presence of a single nonce check is insufficient to cover all these unprotected entry points.
The lack of capability checks on AJAX handlers is particularly worrying, as it means any authenticated user, regardless of their role or permissions, could potentially trigger these functions. This could lead to issues ranging from information disclosure to more serious forms of manipulation if these AJAX actions have unintended side effects. The bundled Guzzle library v1.1 is also noted, which, while not explicitly flagged as vulnerable in the provided data, could represent an outdated component requiring attention in a real-world scenario. In conclusion, while the plugin avoids common pitfalls like raw SQL and unescaped output, the unauthenticated AJAX endpoints represent a critical weakness that overshadows its strengths. The absence of any recorded vulnerabilities might be due to its version or limited usage, and should not be interpreted as an indication of inherent security.
Key Concerns
- Unprotected AJAX handlers
- Missing capability checks on AJAX
- Bundled outdated library (Guzzle v1.1)
SMTP.com Security Vulnerabilities
SMTP.com Release Timeline
SMTP.com Code Analysis
Bundled Libraries
SQL Query Safety
Output Escaping
SMTP.com Attack Surface
AJAX Handlers 3
WordPress Hooks 8
Maintenance & Trust
SMTP.com Maintenance & Trust
Maintenance Signals
Community Trust
SMTP.com Alternatives
WPO365 | MICROSOFT 365 GRAPH MAILER
wpo365-msgraphmailer
Send WordPress emails from a M365 / Exchange Online Mailbox using Microsoft Graph, leveraging OAuth for authentication which is more secure than SMTP
MailerSend – Official SMTP Integration
mailersend-official-smtp-integration
Improve your deliverability and avoid the spam box with MailerSend’s SMTP server. Check your analytics to improve your emails for better conversion!
Simple SMTP Mailer
simple-smtp-mailer
Simplifies local development by configuring WordPress to use SMTP instead of the PHP mail() function
AhaSend Email API
ahasend-email-api
Connect your WordPress site to AhaSend for reliable, fast transactional email delivery with easy SMTP integration and real-time tracking.
CodingBunny Mail SMTP
coding-bunny-mail-smtp
Configure an SMTP server to send emails from your WordPress site. Simple, lightweight, and secure.
SMTP.com Developer Profile
1 plugin · 80 total installs
How We Detect SMTP.com
Patterns used to identify this plugin on WordPress sites during automated security audits and web crawling.
Asset Fingerprints
/wp-content/plugins/smtp-com-mail/admin/css/datepicker.css/wp-content/plugins/smtp-com-mail/admin/css/smtp-com-mail-admin.css/wp-content/plugins/smtp-com-mail/admin/js/datepicker.js/wp-content/plugins/smtp-com-mail/admin/js/smtp-com-mail-admin.jsadmin/js/datepicker.jsadmin/js/smtp-com-mail-admin.jssmtp-com-mail/admin/css/datepicker.css?ver=smtp-com-mail/admin/css/smtp-com-mail-admin.css?ver=smtp-com-mail/admin/js/datepicker.js?ver=smtp-com-mail/admin/js/smtp-com-mail-admin.js?ver=