Post SMTP Plugin WordPress: Complete Guide to Setup and Configuration

October 23, 2025

Jonathan Dough

Ever tried sending emails from your WordPress site only to realize… they never arrived? Yep, that happens. But don’t worry. There’s a hero in town, and its name is Post SMTP.

Post SMTP is a WordPress plugin that fixes your email delivery problems. It makes sure your emails get sent using proper SMTP (Simple Mail Transfer Protocol) – which is just a fancy way of saying “reliable email sending.”

In this guide, we’re walking you through the full setup. No tech jargon. Just fun, simple steps. Ready? Let’s go! 🚀

🔧 What Is Post SMTP?

Think of Post SMTP as a mailman for your website. WordPress tries to send emails, but sometimes they don’t actually get delivered. Post SMTP makes sure those emails are sent correctly using third-party email services like Gmail, Mailgun, SendGrid, and more.

Common things Post SMTP helps with:

  • Contact form emails not sending
  • Password reset emails never arriving
  • WooCommerce order notifications going missing

With Post SMTP, all of that gets fixed. Neat, right?

📦 Installing the Plugin

First things first: you need to install the plugin.

  1. Log in to your WordPress dashboard.
  2. Go to Plugins > Add New.
  3. Search for Post SMTP.
  4. Click Install Now and then Activate.

Easy peasy! Now, let’s set it up.

⚙️ Setting Up Post SMTP

Once the plugin is active, you’ll be prompted to run the Setup Wizard. We recommend you go with it. It makes the process super easy.

Step 1: Open Wizard

From your WordPress dashboard, head over to Post SMTP > Start the Wizard.

Step 2: Enter Your Email Address

This is the email that your WordPress site will use to send messages. It should be a real, working email address. Something like contact@yoursite.com.

Step 3: Choose Your Email Provider

Now, you can pick an email service. Post SMTP supports many popular providers, including:

  • Gmail (or G Suite)
  • SendGrid
  • Mailgun
  • Office365
  • Amazon SES

Choose the one you already use, or want to use. Don’t have one yet? Gmail is a good start.

Step 4: Enter Server Details

This step will depend on the email provider you chose. You’ll need to input:

  • SMTP server address (like smtp.gmail.com)
  • Port (usually 587 or 465)
  • Security type (TLS or SSL)

Don’t worry. Post SMTP will often auto-fill this for you. Magic! 🧙‍♂️

Step 5: Authentication

You now need to connect your email account. Most services use either:

  • OAuth 2.0: A quick login and approval process (like Gmail).
  • Username & Password: You enter your email login details.

Tip: If you’re using Gmail, OAuth is great. It’s safer and easier.

Step 6: Confirm and Send a Test Email

You’re almost done. The wizard will now test everything. Click Send a Test Email and check your inbox.

If it arrives, congrats! 🎉 Your email delivery is fixed. If it doesn’t, go back and double-check the settings.

🔍 Post SMTP Dashboard Overview

Once you’re set up, it’s time to explore the dashboard. Here’s what you’ll see:

  • Email Log – See which emails were sent, and if any failed.
  • Settings – Edit your SMTP server or authentication details.
  • Notifications – Set alerts for when an email fails to send.
  • Connectivity Test – Run a check-up on your email settings anytime.

The email log is especially handy. It saves you from wondering “Did that email send?”

📨 Advanced Settings (Optional But Cool)

Once you’re comfortable, you can explore some advanced features:

  • Fallback SMTP: Set up a backup provider in case the main one fails.
  • Email Headers: Customize headers for better spam protection.
  • Debug Mode: Helps you troubleshoot tricky problems.

Not necessary for beginners, but nice to know they’re there.

⚠️ Gotchas to Watch Out For

Here are a few common hiccups and how to fix them:

  • Gmail not working? Make sure you’ve enabled access for “less secure apps” or use OAuth.
  • Emails still not sending? Check if your hosting company blocks SMTP ports (some do).
  • Plugin conflict? Deactivate other email plugins and try again.

If all else fails, Post SMTP has a built-in diagnostics tool that shows what’s wrong. Super helpful!

👍 Why We Love Post SMTP

Here’s why this plugin is loved by thousands of WordPress users:

  • Totally free (with no hidden paywalls)
  • Works with all major email providers
  • Helpful test tool and error logs
  • Regular updates & active support community

And it’s easy enough for beginners to use, but powerful enough for pros. That’s what we call a win-win.

🥳 Final Thoughts

Setting up Post SMTP might seem like a chore at first, but it’s totally worth it. In just a few minutes, your WordPress email issues are solved – forever.

No more sending emails into the void. No more frustrated users wondering where their password reset email went. Just smooth, reliable delivery every time.

So go ahead, give Post SMTP a spin and get your site talking the professional way! 💌

Happy emailing!

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