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Best inbox plugins for WordPress

The most popular inbox plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. SMTP2GO for WordPress leads with 40K+ active installs, ahead of INBOX Forms (50+) and gRDV Messages (50+). All 19 plugins tagged “inbox” are below, with figures from WordPress.org that update every day.

Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.

Research this niche or see all plugins.

Top 10 inbox plugins

  1. 1.
    SMTP2GO for WordPress

    The most installed inbox plugin, with 40K+ active installs. Rated 5.0 from 67 reviews, updated 2 months ago.

  2. 2.
    INBOX Forms

    50+ active installs. No reviews yet, last updated 5 years ago. Tested only up to WordPress 5.8.19.

  3. 3.
    gRDV Messages

    50+ active installs. No reviews yet, updated 4 days ago.

  4. 4.
    WP INBOX

    20+ active installs. Only 2 reviews so far, last updated 5 years ago. Tested only up to WordPress 5.7.21.

  5. 5.
    Quarivo Form Shield

    20+ active installs. No reviews yet, updated 2 months ago.

  6. 6.
    4WP Notifications

    10+ active installs. No reviews yet, updated 4 months ago.

  7. 7.
    Admin User Messages

    10+ active installs. Rated 3.6 from 5 reviews, last updated 12 years ago. Tested only up to WordPress 3.9.40.

  8. 8.
    Inbox Widget

    10+ active installs. Only 1 review so far, last updated 15 years ago.

  9. 9.
    tlloancy Outgoing Mail Inbox

    10+ active installs. No reviews yet, updated 2 weeks ago.

  10. 10.
    NaveenCodes Smart Contact Inbox for Contact Form 7

    Fewer than 10 active installs. No reviews yet, updated 2 months ago.

All 19 plugins tagged “inbox”