Best SMTP Services Compared

8 Best SMTP Services for Email Marketing (2022)

Are you looking for the best SMTP services for email marketing?

SMTP services help you to send emails to your users and customers from your website safely, without fail.

Emails are an important means of communication between your website and users. So, it’s essential to ensure that your emails are properly sent and delivered to your users’ inboxes. SMTP services help you achieve that goal.

In this article, we’ll take a look at the best SMTP services for email marketing.

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Why Do You Need SMTP Services?

SMTP stands for Simple Mail Transfer Protocol. It is the industry standard for sending electronic messages or emails. It uses proper authentication, which increases the chances of your emails being delivered properly.

SMTP Services for Email Deliverability

If you’ve got a website, you may have set up automated user-triggered emails to notify users about their activity on your site. For example, when they register a new account, change a password, purchase a product, etc.

But a lot of times, transactional emails like these fail to reach users’ inboxes. And, you may be losing revenue because of the breakdown in communication.

These failures happen when your mailing system is not configured correctly. For example, if you’re using WordPress, then the problem occurs because its default PHP mail() function is not configured correctly by most hosting services.

So, the solution to this problem is to use an SMTP service that configures email authentication properly for you.

With that said, let’s take a look at the best SMTP services for reliable email marketing.

SMTP Services Video Overview

8 Best SMTP Services

  2. Sendinblue
  3. Mailjet
  4. Mailgun
  5. SendGrid
  6. Amazon SES
  7. G Suite
  8. Postmark


best smtp services is the best SMTP service you can get your hands on. It has over 22 years of experience and is trusted by over 100,000 businesses including companies like Best Buy and T-Mobile.

Using, it’s easy to send and track a large volume of emails while ensuring fast delivery. The service ensures that your transactional emails reach the inbox of your subscribers without any delay. offers a Reputation Defender addon that monitors your email list health, protects emails from getting blacklisted by internet service providers (ISP), and makes sure that emails reach your audience.

You can set up in no time, as it easily integrates with popular platforms, including WordPress. It also provides secure sending through SSL encryption and blocks spam.

Besides that, the service offers 24/7 customer support and detailed analytics reports that show email delivery and engagement performance.

Get started with today!

2. Sendinblue

sendinblue best smtp services

Sendinblue is the best SMTP service and also one of the most popular email marketing services in the world. It offers SMTP email services for both user-triggered transactional emails and bulk email campaigns. Also, Sendinblue provides a powerful SMS marketing and live chat solution for your business.

With Sendinblue, you can send transactional emails and highly targeted marketing emails to your users or subscribers. Backed by a team of email deliverability experts, it provides a reliable SMTP server for your business emails.

Sendinblue works well with WordPress and other marketing tools like OptinMonster, Google Analytics, and many more.

Get started with Sendinblue today!

3. Mailjet

mailjest most popular smtp

Mailjet is another popular SMTP provider and is designed for fast-moving teams that want a complete email marketing solution. It offers an easy to use email builder through which you can create responsive and attractive emails with just a few clicks.

Mailjet offers a free SMTP server that lets you send tons of emails with its robust delivery infrastructure. Setting up an SMTP server is very easy with Mailjet. You can also integrate their SMTP services with any system.

And with a variety of ports on offer, you get greater flexibility as you can select a port that’s suitable for your client or ISP. You also get TLS or SSL encryption to secure your emails.

Get started with Mailjet today!

4. Mailgun

mailgun smtp

Mailgun is a super powerful SMTP provider for developers. Its powerful email sending infrastructure lets you send millions of transactional and bulk emails with higher delivery rates.

You can use Mailgun with a WordPress website easily. The popular SMTP plugin WP Mail SMTP also offers native integration with Mailgun to connect it to your WordPress site smoothly.

Mailgun is a highly scalable SMTP service. However, it’s quite complicated for beginner-level users.

Get started with Mailgun today!

5. SendGrid

sendgrid smtp services

SendGrid is a popular email delivery platform. It allows you to send and create email newsletters, promotions, shipping notifications, password resets, and all types of emails with confidence.

SendGrid is user-friendly in that you can easily integrate with their email API and send emails that will reach the inbox. Also, it lets you authenticate your domains and offers a dedicated IP address to boost email deliverability.

It’s easy to integrate and use the SendGrid SMTP relay service with WordPress and other platforms. To connect your WordPress site with SendGrid, you can also use the WP Mail SMTP plugin free.

Get started with SendGrid today!

6. Amazon SES

amazon aws smtp

Amazon SES or Amazon Simple Email Service is a highly scalable cloud-based email sending service. It’s a product of the leading cloud computing service company Amazon Web Services.

The Amazon SES comes with a powerful SMTP interface capable of sending tons of emails smoothly. It includes features like content filtering, dedicated IP addresses, and a reputation dashboard to improve your sender reputation.

Therefore, you can confidently send transactional messages and marketing newsletters, and also receive incoming emails. SES’s robust structure ensures that your emails don’t end up in the spam folder.

Get started with Amazon SES today!

7. G Suite

gsuit smtp

G Suite is a package of productivity apps for business by Google. It includes professional email, online storage, calendar, and more for your business.

Using this SMTP provider, you can use Google’s SMTP servers to send emails to your customers. It’s easy to integrate the Gmail SMTP in WordPress with the WP Mail SMTP.

However, G Suite is suitable only for small businesses because it lets you send only 2000 emails per day.

Get started with G Suite today!

8. Postmark


Postmark is among the best SMTP providers you can get your hands on. It offers quick email delivery and easy integration.

Postmark specializes in transactional emails like payment receipts and account notifications. So, this means that you get top-notch security and detailed analytics.

It offers 3 servers in the US, 1 server in Singapore, and 1 server in Amsterdam.

Get started with Postmark today!

Connecting SMTP Services to Your WordPress Site

Now that you know the best SMTP services on the market, you may be wondering how to connect an SMTP service with your WordPress site.

If so, then you’re in luck! The best WordPress SMTP plugin WP Mail SMTP makes it effortless to connect your WordPress site with the top SMTP relay services.

WP Mail SMTP Best WordPress SMTP Plugin

WP Mail SMTP is available as a free plugin with easy setup options for Mailgun, SendGrid, Gmail SMTP, and more. There’s also the premium plan with Microsoft SMTP, Amazon SES SMTP support.

Used by more than 1 million websites, WP Mail SMTP is the perfect SMTP solution for WordPress. To learn more, visit the official website and documentation.

We hope this article helped you to find the best SMTP services for email marketing. You may also want to see our guide on how to create a free business email address.

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