WordPress SMTP & Email: Complete Fix Guide for Sending Issues

WordPress emails frequently fail to deliver. Contact form submissions disappear, password reset emails never arrive, and WooCommerce order confirmations land in spam. The root cause is almost always the same: WordPress relies on PHP mail() by default, which most hosting providers either block, throttle, or send through unauthentic servers.

The fix is straightforward, configure WordPress to send through a proper SMTP service. This guide covers everything: why emails fail, how to fix it, which plugins to use, and step-by-step setup.

Why WordPress Emails Fail

The PHP mail() Problem

Issue	PHP mail()	SMTP Service
Authentication	None	SPF, DKIM, DMARC
IP reputation	Shared hosting IP (often blacklisted)	Dedicated, high-reputation IPs
Delivery rate	50-70%	95-99%
Spam filtering	Frequently caught	Passes spam filters
Tracking	None	Opens, clicks, bounces
Reliability	Silent failures common	Delivery confirmation

Common Symptoms

• Contact form submissions never received
• Password reset emails do not arrive
• WooCommerce order confirmations missing
• User registration emails fail
• Comment notification emails in spam
• Plugin notification emails not sending

How to Fix WordPress Email: Step by Step

Step 1: Choose an SMTP Plugin

Plugin	Active Installs	Free Features	Best For
WP Mail SMTP	3M+	All mailers, email log	Most sites
Post SMTP	300K+	All mailers, logs, alerts	Feature-rich free tier
FluentSMTP	100K+	Multiple connections, logs	Developer-friendly
Brevo Plugin	100K+	Direct Brevo integration	Brevo users

Recommendation: WP Mail SMTP for general use, or the Brevo plugin if you already use Brevo for marketing.

Step 2: Choose an SMTP Service

Provider	Free Tier	Setup Difficulty	Best For
Brevo	300/day (9,000/month)	Easy	Most WordPress sites
Gmail SMTP	500/day	Medium	Personal sites
SendGrid	100/day (3,000/month)	Medium	Developer sites
Amazon SES	62,000/month (EC2)	Hard	AWS-hosted sites
Mailgun	Trial only	Medium	High-volume sites

Recommendation: Brevo’s free tier handles most WordPress sites and requires no credit card.

Step 3: Install and Configure

Using WP Mail SMTP + Brevo:

1. Install WP Mail SMTP from the WordPress plugin directory
2. Go to WP Mail SMTP > Settings
3. Set From Email to your domain email (e.g., [email protected])
4. Set From Name to your site name
5. Choose “Brevo” as the mailer
6. Enter your Brevo API key (found in Brevo > Settings > SMTP & API)
7. Click Save Settings
8. Send a test email to verify

Total setup time: Under 10 minutes.

1. WordPress

   Forms, resets, orders
   wp_mail()
2. WP Mail SMTP

   mailer: Brevo
   API key
3. Brevo

   SMTP service

   Opens, clicks, bounces
   SPF, DKIM
4. Inbox

Step 4: Configure Email Authentication

For best deliverability, set up these DNS records:

Record	Purpose	Priority
SPF	Authorizes Brevo to send for your domain	Required
DKIM	Cryptographically signs your emails	Required
DMARC	Policy for handling unauthenticated email	Recommended

Brevo provides the exact DNS records to add. See our SPF DKIM DMARC guide for detailed instructions.

Step 5: Test Thoroughly

After setup, test these WordPress email types:

• Contact form submission
• Password reset email
• New user registration
• Comment notification
• WooCommerce order confirmation (if applicable)
• Plugin notification emails

WordPress Email Plugins Compared

WP Mail SMTP

Pros: Most popular, supports all major SMTP services, email logging, one-click setup wizards. Cons: Some features (detailed logs, alerts) require Pro version. Free features: All mailers, basic logging, test emails.

Post SMTP

Pros: Full-featured free version, failure alerts, email logging, OAuth support. Cons: Slightly more complex interface. Free features: All mailers, detailed logs, failure notifications.

FluentSMTP

Pros: Connect multiple SMTP services simultaneously, detailed logs, lightweight. Cons: Newer, smaller community. Free features: Multi-connection, full logging, all mailers.

Brevo Official Plugin

Pros: Direct Brevo integration, marketing features included, contact sync. Cons: Brevo-specific only. Free features: SMTP sending, contact management, basic marketing.

WordPress Newsletter & Email Marketing

Beyond fixing transactional email, you can use WordPress with Brevo for full email marketing:

Newsletter Plugins

Plugin	Type	Best For
Brevo Plugin	Full marketing integration	Complete email marketing
Mailchimp for WordPress	Signup forms + Mailchimp	Simple newsletter signups
Newsletter Plugin	Self-hosted newsletters	Budget-conscious sites
MailPoet	Built-in email builder	WordPress-native email

Email Subscription Setup

Add email subscription to your WordPress site:

1. Install Brevo’s WordPress plugin
2. Create a signup form in Brevo
3. Add the form to your sidebar, footer, or pop-up
4. Subscribers sync automatically with Brevo
5. Build welcome series and newsletter campaigns

WordPress Email Marketing Automation

Combine WordPress with Brevo for marketing automation:

Automation	Trigger	Plugin/Tool
Welcome series	Form submission	Brevo automation
Blog digest	New post published	Brevo RSS campaign
Cart recovery	WooCommerce cart	Brevo + WooCommerce plugin
Review request	Order delivered	Brevo automation
Re-engagement	90 days inactive	Brevo automation

For WooCommerce stores, Brevo’s plugin syncs order data to enable automated post-purchase emails and cart recovery.

Troubleshooting Common Issues

Emails Still Going to Spam

1. Verify SPF, DKIM, DMARC records are set correctly
2. Check if your domain is on any blacklists
3. Ensure From Email uses your domain (not gmail.com)
4. Run a spam test
5. Warm up sending volume gradually

Plugin Conflicts

1. Deactivate other email plugins (only one should handle email)
2. Check for plugins that override wp_mail()
3. Test with a default theme to rule out theme conflicts

WooCommerce Emails Not Sending

1. Go to WooCommerce > Settings > Emails
2. Verify each email type is enabled
3. Check that WP Mail SMTP is configured
4. Test by placing a test order
5. Check email logs for errors

What is still wrong after setup?

1. Mail goes to spam

   Check authentication

   SPF, DKIM, DMARC, blacklists, a From address on your domain.

2. Mail fails inconsistently

   Remove plugin conflicts

   Only one plugin should handle email.

3. WooCommerce mail missing

   Check WooCommerce email settings

   Each email type enabled, then a test order.

Getting Started

1. Install WP Mail SMTP from the WordPress plugin directory
2. Create a free Brevo account at brevo.com
3. Configure the plugin with your Brevo API key
4. Set up DNS authentication (SPF + DKIM)
5. Send a test email to confirm delivery
6. Test all WordPress email types (forms, registration, WooCommerce)

For complete SMTP configuration details, see our SMTP complete guide. For WordPress email marketing strategies, read our WordPress email marketing guide.