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How to Send Email Using SendGrid with WordPress

How to Send Email Using SendGrid with WordPress

As you may know, WordPress is capable of sending basic transactional emails out of the box. However, a lot of web hosts don’t support that functionality or offer email capabilities at all. To get around this issue, you have to rely on third-party transactional email providers such as SendGrid.

This platform powers email for some of the biggest companies in the world. That means it can make short work of your WordPress website’s registration and password reset emails. In this article, we’ll show you exactly how to set SendGrid up to work with your site in three short steps.

Let’s dive in!

What Is SendGrid?

SendGrid is a platform that offers both marketing and transactional email services. This distinction is important because, for the purposes of this tutorial, we’re going to focus on using it as a transactional email provider and not for marketing campaigns.

The SendGrid homepage.

For transactional emails, SendGrid can use either Simple Mail Transfer Protocol (SMPT) or its web API. We’re going to focus on the latter since it’s easier to implement with WordPress and is typically faster. Plus, by integrating the platforms via the API, you can improve deliverability rates.

Using a dedicated transactional email provider is also a smart move when it comes to scalability. A lot of web hosting platforms aren’t optimized for email delivery, even if they do support it. With SendGrid – or another reputable service – you should be able to handle thousands of transactional messages per day.

If you run a WordPress website with a modest user base, SendGrid offers a free plan that should be perfect for your needs. You can use it to send up to 100 emails per day. That should be more than enough for signup confirmations and password resets for a small to medium-sized site.

For an online store, you might want to consider using a premium plan that can handle a higher volume of emails. After all, e-commerce sites need to deal with a whole other set of transactional emails, such as purchase confirmations and shipping notifications. Prices start at $14.95 per month.

How to Send Email Using SendGrid with WordPress (In 3 Steps)

To follow this tutorial, you’ll need two things: access to a WordPress website and a SendGrid account. For the latter, you can take advantage of the free plan to test the service. Once you have both prerequisites, move on to Step 1.

Step 1: Find Your SendGrid API Key

Once you set up your SendGrid account, you’ll gain access to your user dashboard. Here, you can review which applications you’ve authorized to work with SendGrid.

Right now, that list should be empty. To fix that, go to Settings > API Keys and click on the Create API Key button:

Creating a SendGrid API key.

On the next page, you can set a name for the API key for internal identification purposes. The service will ask what level of permissions you want the key to give access to. We recommend the Full Access option:

Configuring your API key's access level.

Now click on Create and View and you’ll gain access to your API key right away. Keep in mind that you only get to see the full key once for security reasons, so make sure you store it safely:

Copying your new SendGrid API key.

You’re going to need that key in a moment, so hold on to it.

Step 2: Connect SendGrid With WordPress

The easiest way to integrate WordPress with SendGrid is by using a plugin. SendGrid offers an official tool you can use for this, but it doesn’t receive regular updates.

Instead, we’re going to use the Post SMTP plugin, which you can connect to SendGrid using the API key you generated a minute ago:

The Post SMTP plugin.

Install and activate the plugin, then navigate to the Post SMTP tab on your dashboard. You’ll see an option to use the plugin’s configuration wizard – click on the blue button to launch it:

Starting Post SMTP's configuration wizard.

First up, the plugin will ask you to enter the sender’s email. By default, it’ll use your administrator email, which should work just fine:

Configuring your sender email.

Next up, you’ll need to set up your outgoing mail server hostname. Since we’re using SendGrid’s API instead of SMTP, you can leave the default value in or enter any random string:

Configuring your outgoing hostname settings.

Now Post SMTP will run a connectivity test for several popular email service providers, including SendGrid. Once the plugin lets you make a choice, select the SendGrid API option under Socket:

Configuring Post SMTP to use SendGrid.

Finally, go ahead and paste the API key you generated during Step 1:

Pasting your SendGrid API key.

Before you wrap things up, the plugin will ask you what to do in case SendGrid fails to deliver an email. By default, it’ll notify you of that failure via email, but you can also configure it to use Chrome notifications.

Configuring what to do with email sending failure notifications.

Post SMTP includes an email testing feature you can use to check if your mailing provider is working properly. However, before you do so, let’s return to the SendGrid dashboard and verify your domain.

Step 3: Authenticate Your WordPress Website’s Domain

As a rule of thumb, it’s recommended you authenticate your domain through whatever email provider you’re using. That way, your transactional emails are much less likely to end up in recipients’ spam folders.

To do this in SendGrid, go to your account dashboard and jump to the Settings > Sender Authentication tab. Here, you’ll see an option that says Domain Authentication and next to it a button that reads Get Started – click on it:

Starting SendGrid's domain authentication process.

The first thing SendGrid will ask is what Domain Name Server (DNS) your domain uses. That can be either a domain registrar or your web host, depending on where you registered your domain (and if you’ve transferred it):

Configuring your DNS host settings.

If your web host or registrar doesn’t appear on that list, select the Other Host (Not Listed) option.

Next up, you can choose whether to use your domain for tracking links as well. Since that doesn’t have an impact on your email’s deliverability or presentation, select whichever option you prefer.

On the next page, you’ll need to enter the domain of your WordPress website:

Entering your website's domain.

At this stage, SendGrid will show you a set of DNS records you need to add via your registrar or web host:

Modifying your DNS records.

You may need to check your host’s knowledge base or contact support for help with this.

Once you add those records, you can click on the Verify button in your SendGrid dashboard. If everything is working correctly, you’ll see a success message. Now you can sit back and let SendGrid take care of your WordPress emails.


SendGrid is one of the many services you can use to power your website’s transactional emails. However, the service stands out due to its generous free plan, which is perfect for WordPress websites that send a moderate number of emails per day (anything less than 100 and you’re set!).

Configuring SendGrid to work with WordPress is easy and it only takes three steps:

  1. Find your SendGrid API key.
  2. Connect SendGrid with WordPress using Post SMTP.
  3. Authenticate your WordPress website’s domain through SendGrid.

Do you have any questions about how to send email using SendGrid with WordPress? Let’s go over them in the comments section below!

Article thumbnail image by Eny Setiyowati / shutterstock.com

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