Best WordPress SMTP Plugins in 2026 (Free and Paid Compared)

If your WordPress site sends order receipts, password resets or contact form notifications, you need an SMTP plugin. By default WordPress hands email to your server’s PHP mail() function. Many hosts throttle or block it, and the messages that do get out are often unauthenticated, so Gmail and Outlook push them into spam. An SMTP plugin sends WordPress email through a real email provider instead. This guide compares the best WordPress SMTP plugins for 2026, free and paid. We build one of them (MailBolt SMTP), so we’ve included it, but we’ve also said plainly where another plugin is the better choice.

What to look for in a WordPress SMTP plugin

• Mailer support. Basic SMTP works with almost any mailbox, but API mailers (Amazon SES, Postmark, SendGrid, Mailgun, Brevo, Resend and others) are faster and more reliable because they use HTTPS instead of SMTP ports, which some hosts block.
• Email log. A searchable list of what was sent, when and whether it failed. Essential for stores and client sites. Check what the log stores: full bodies can include password-reset links.
• Backup connection. If your main provider fails or hits a limit, a second connection retries the email.
• Failure alerts. A Slack, Discord or email alert when sending breaks, so you find out before a customer does.
• Credential security. API keys should be encrypted at rest, or definable in wp-config.php.
• Licence cost. Some plugins are fully free, some are freemium with yearly renewals, and some use a one-time price. Add up three years.

Quick comparison

Vendors move features between free and paid tiers often, so check each plugin’s current page before deciding.

1. FluentSMTP

FluentSMTP is the plugin to beat on value: it’s completely free and open source, from the team behind Fluent Forms and FluentCRM. It connects natively to Amazon SES, Mailgun, SendGrid, Brevo, Postmark, SparkPost, Elastic Email, Gmail/Google Workspace, Outlook/Microsoft 365 and generic SMTP. It includes an email log with resend, multiple connections with a fallback, and notifications to channels like Slack, Telegram and Discord.

Choose it if you want a solid free option and are comfortable setting up your provider yourself. Consider something else if you need routing rules per email type, or prefer a plugin with paid support behind it.

2. WP Mail SMTP

WP Mail SMTP is the most installed SMTP plugin, with a clear setup wizard and good documentation. The free version supports many providers, including SendLayer, Brevo, Mailgun, SendGrid, Postmark, SMTP2GO, Gmail and generic SMTP. Email logs, a backup connection, Amazon SES, Microsoft 365 and Zoho mailers, alerts and reports are part of the paid Pro plans, which renew yearly.

Choose it if you are new to email setup and value a guided wizard and vendor support. Consider something else if you don’t want a yearly renewal just to keep your email log.

3. MailBolt SMTP and MailBolt SMTP Pro (by 007AJ)

MailBolt comes in two parts. The free MailBolt SMTP plugin sends through any SMTP account, with one-click presets for Gmail (app password), Outlook.com, Yahoo, Zoho, iCloud, Fastmail, Office 365/GoDaddy and cPanel mailboxes. It includes a setup wizard, a test tool that explains failures in plain English (with an SMTP transcript where passwords are masked), the last 20 sending errors, and passwords encrypted at rest or defined in wp-config.php. It has no tracking and nothing on the front end, and nothing in it expires.

The paid MailBolt SMTP Pro add-on adds:

• 9 API mailers: Gmail/Google Workspace, Microsoft 365/Outlook, SendGrid, Mailgun (US and EU), Brevo, Postmark, Amazon SES, SMTP2GO and Resend
• A privacy-first email log: by default it stores only recipient, subject, status, date, mailer and error. If you choose to save bodies, reset links, download keys and one-time codes are redacted. Resend and CSV export included
• A backup connection that retries a failed email once through a second mailer
• Smart routing: up to 5 rules, for example all order emails through Amazon SES
• Failure alerts by email, Slack, Discord, Microsoft Teams or webhook (at most one per channel every 15 minutes)
• A weekly summary, 30-day stats and switches for individual WordPress notification emails

It’s a one-time purchase with lifetime updates, not a subscription.

Choose it if you run a store, membership or client sites and want a log, alerts and routing with no renewal. Consider something else if you only need a basic free connection (the free MailBolt plugin or FluentSMTP will do).

4. Post SMTP

Post SMTP has been around for years and is strong on troubleshooting. The free plugin includes an email log with resend, a fallback SMTP server, a connectivity test that checks which ports your host allows, and failure notifications, including a companion mobile app. Paid extensions add more API mailers and features.

Choose it if you are debugging a stubborn host and want detailed diagnostics. Consider something else if you want a lighter, simpler admin.

5. SureMail

SureMail, from the makers of the Astra theme, is a newer free plugin with a clean interface. It supports several providers, multiple connections with fallback, and an email log. It’s a good free pick if you already use Brainstorm Force products and want something simple.

Choose it if you want a modern, free interface. Consider something else if you need routing rules or team alerts.

6. Easy WP SMTP

Easy WP SMTP is a long-standing, lightweight option. The free version covers SMTP and several mailers; email logs, a backup connection and alerts are in its paid Pro plans.

Choose it if you want a small plugin for a single connection. Consider something else if you need logs without a subscription.

Which SMTP plugin should you choose?

• Personal blog or brochure site: any free plugin with a reliable provider. FluentSMTP or the free MailBolt SMTP are both fine.
• WooCommerce or digital downloads store: you need a log, alerts and ideally a backup connection. FluentSMTP (free) or MailBolt SMTP Pro (one-time, with routing for order emails) are strong choices.
• Agency managing client sites: look for a log you can show clients, alerts to your team’s Slack or Teams, and no per-site renewals eating into care-plan margins.
• Beginner who wants hand-holding: WP Mail SMTP’s wizard and support are worth the renewal for some people.

The plugin is only half the job: set up your domain

No SMTP plugin can fix missing DNS records. Whichever plugin you pick:

1. Send from an address on your own domain (for example hello@yourdomain.com), not a free Gmail address.
2. Add the SPF and DKIM records your email provider gives you.
3. Add a DMARC record. Start with p=none, check reports, then tighten it.
4. Send a test to a Gmail account and use “Show original” to confirm SPF, DKIM and DMARC all say PASS.

Our step-by-step guide to fixing WordPress emails that are not sending covers these records in detail.

Which email provider should you connect?

For low-volume sites, a Google Workspace or Microsoft 365 mailbox is fine, but they have daily sending limits. For stores and busier sites, a transactional email service is more reliable. Amazon SES is the cheapest at scale but has a stricter setup, Postmark is known for fast delivery of transactional email, and Brevo, SMTP2GO, Mailgun, SendGrid and Resend all offer free or low-cost starter tiers. Keep marketing newsletters on a separate service or subdomain so a bad campaign doesn’t hurt your receipts.

Frequently asked questions

Is a free SMTP plugin good enough?

For many sites, yes. Delivery depends mostly on your provider and DNS records. Paid features matter when email is tied to revenue: logs to prove what was sent, alerts when it fails and a backup connection.

Can I run two SMTP plugins at once?

No. They both try to take over wp_mail() and conflict. Pick one, and deactivate any other plugin that sends mail through its own SMTP setting.

Why does my host block SMTP ports?

Some hosts block ports 25, 465 or 587 to stop spam from compromised sites. API mailers send over HTTPS (port 443), which avoids the problem completely.

Do SMTP plugins work with WooCommerce and contact forms?

Yes. They work at the wp_mail() level, so WooCommerce, Contact Form 7, WPForms, booking plugins and WordPress core emails all go through them.

Related: keep form submissions safe even when email fails with our guide to saving Contact Form 7 entries, see MailBolt SMTP Pro, or browse the 007AJ shop.