Reliable mail relay for WordPress. Install, then add one DNS record.
The official SecureSMTP plugin routes wp_mail() through our DKIM-aligned relay so contact forms, password resets, order confirmations, and notifications actually land in the inbox — not the spam folder.
Free · GPLv2+ · 6.0 · PHP 8.0+ · You’ll need a free SecureSMTP account to get your API key after install.
- Version
- 1.25.0
- WordPress
- 6.0+
- PHP
- 8.0+
- License
- GPLv2+
- Contact Form 7
- WPForms
- Forminator
- Elementor
- Gravity Forms
- WooCommerce
- Fluent Forms
- wp_mail()
Built for delivery, not buzzwords.
Five things this plugin actually does — no AI marketing, no “world-class”, no “synergy.”
wp_mail() routing
Every plugin that sends mail (CF7, WPForms, Forminator, Elementor, WooCommerce, password resets, comment notifications) gets routed through our authenticated relay automatically. No config per plugin.
DKIM aligned to your domain
One DKIM record and your mail goes out signed as yourdomain.com (Advanced mode adds an MX and an SPF record). Gmail, Outlook, Yahoo all read this as legitimate.
Delivery analytics
See every email: sent, delivered, opened, clicked, bounced, complained. Filter by source plugin, recipient, or country. Catch deliverability issues before customers complain.
AI spam classifier
Submissions go through Claude Haiku before they reach you. Real leads in your inbox; bots quietly logged for review. No CAPTCHA friction for legitimate users.
Drop-in forms
Need a contact form or lead capture? The plugin includes hosted form templates with field validation, anti-abuse, and email notifications. Embed with a shortcode.
Per-site API key
One API key per WordPress site, rotateable from the dashboard. Disable a site instantly if it’s compromised; everything else keeps running.
Install in a few minutes.
One zip, one API key, one DNS record. Then forget it’s there.
- 1
Download
Click the button above to grab the zip — no signup needed.
- 2
Upload to WP
In wp-admin, go to Plugins → Add New → Upload Plugin → activate.
- 3
Paste API key
Create a free SecureSMTP account, register your site, paste the key.
- 4
Verify domain
Add the DKIM record (Advanced mode also adds an MX and an SPF record). Once it shows as verified, your mail sends from your own domain.
pre_wp_mail filter, so running both plugins side-by-side can produce duplicate sends.What’s new in 1.25.0
Latest changes shipped with the plugin.
- Renamed to Secure SMTP across admin UI
- Updated branding to SecureSMTP.com
- Author now Technologia FZE
- Email delivery analytics with open + click tracking
- New mail-router dashboard panel
- Improved DKIM walkthrough
- Cloudflare Turnstile invisible CAPTCHA
- AI spam classifier (Claude Haiku)
- Mail abuse alerts
Get your wp_mail() out of the spam folder.
Free plugin, free SecureSMTP plan. Upgrade only when you exceed the Free quota.
Built by Technologia FZE · Sharjah Research Technology and Innovation Park (SRTIP), Sharjah, UAE