Post SMTP – Complete Email Delivery and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
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About
Install Post SMTP (WordPress SMTP Plugin) to fix WordPress email delivery. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Zoho, Amazon SES, etc.
Security History
What It Does
Post SMTP replaces WordPress's default PHP mail function with authenticated SMTP delivery through providers like Gmail, Microsoft 365, SendGrid, Mailgun, Amazon SES, and Brevo. It logs every outbound email, surfaces delivery failures with alerts, and includes a fallback 'Backup SMTP' option that kicks in when the primary mailer is unreachable. A companion mobile app lets site admins monitor email health and resend failed messages from a phone.
Who It's For
This plugin is a strong fit for small business sites, WooCommerce stores, membership platforms, and agencies that send transactional email and need visibility into whether messages actually arrive. Given the 300,000 active installs and broad mailer support, it suits owners who want a dedicated deliverability tool rather than a generic forms or marketing plugin. Non-technical users will also appreciate the mobile app for monitoring on the go.
Who Should Skip It
Sites that only send a handful of contact-form emails per month, or hosts running a fully managed WordPress stack (like WP Engine or Kinsta) where SMTP is already configured at the server level, will get little value from this plugin. Developers building a custom transactional system on top of a dedicated API (SES, Postmark, Resend) also do not need a WordPress-level SMTP layer sitting on top.
The Bottom Line
Post SMTP earns a 91.26/100 quality score and delivers genuine value through its backup SMTP failover, delivery alerts, and mobile monitoring, features that most basic SMTP plugins lack. Its main weakness is brand recognition: with 300,000 installs against WP Mail SMTP's 4 million, there is a smaller community and fewer third-party tutorials to lean on. For most WordPress sites sending transactional email, it is a dependable and actively maintained choice.
Related Plugins
Pick this when you have the largest plugin community matters most for long-term support and you want the most battle-tested option with 4 million installs.
Pick this when you want similar mailer coverage and logging but prefer a lighter, more modern codebase backed by the Fluent ecosystem.
Pick this when your primary need is Mailchimp newsletter and list management rather than transactional SMTP delivery.
Pick this when you want a simpler SMTP-only tool without the backup mailer or mobile app and do not need detailed delivery logs.
Pick this as a complementary add-on when you already have a mailer configured and only need the logging layer.