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Best Smtp Service For Email Marketing

When you send out an email marketing campaign, you will want to make sure that it reaches your customers. You should always use marketing software that can send the emails correctly and will not bounce the messages back to the people who have subscribed. With the best smtp service for email marketing, you can increase your response rate, reduce your bounce rate, and ensure that your customers receive more relevant messages from you.

When it come to an email marketing, valuable information will keep the attention of your readers. The hard part is making that useful information digestible. By the end of this guide, you will know the best smtp service for email marketing is.

Why You Need an SMTP Service Provider for WordPress Emails?

All WordPress websites rely heavily on email to do various tasks. For example:

  • Recovering lost password
  • Registering a new account
  • Notifications for comments, new articles, password changes, and more
  • If its an online store, then sending customers order confirmation, invoices, and delivery information via email.

By default, WordPress is configured to send emails using the PHP mail() function. This is the primary reason why users complain about WordPress not sending email issue.

There are a number of problems with the default mail method, and why it doesn’t work.

Most hosting providers don’t have this function configured properly. Some even disable it completely to prevent their servers from abuse.

Misusing this function is a common problem as it does not require authentication and can be used to send spam emails.

Even if the mail function is working on your WordPress hosting, sometimes your WordPress emails may still end up in spam because most spam filters will verify sender email, location, domain name, and it would flag your site email as suspicious or spam.

The only way to fix this problem is by using an SMTP server to send WordPress emails.

What is SMTP?

SMTP or Simple Mail Transfer Protocol is the industry standard to send emails on the internet. It uses proper authentication which increases the chances that your emails will actually get delivered in users inbox.

There are both paid and free SMTP service providers. In fact, you can get a free SMTP account with a business email address from Google or Outlook.

However, there is a limit on how many emails you can send using the traditional email services. Usually, these free email providers like Gmail or Outlook don’t want you to use their SMTP servers for automatic emails like those sent by a WordPress website.

This is why you need to sign up with one of the well-known SMTP service providers to ensure that your emails are properly delivered. Don’t worry, a lot of the top SMTP companies offer very generous free SMTP plans that are good enough for most websites.

Let’s take a look at the best SMTP service providers with high deliverability.

Best SMTP Service Providers

There are many SMTP service providers that allow you to send mass emails, WordPress emails, transactional emails, and more.

However, each one of them is different in terms of features, pricing, ease of use, number of emails allowed on free plan, and most importantly their track record on deliverability.

Following are the best SMTP service providers that offer higher deliverability and best set of features.


best smtp email service wp mail smtp

WP Mail SMTP is the best WordPress SMTP plugin and it allows you to easily send WordPress emails using any SMTP email service provider. Plus, it’s super easy to set up.

It’s available as a free SMTP plugin, or you can upgrade to the pro plugin to get access to more features.

WP Mail SMTP offers easy setup for other mail clients like SendGrid, Mailgun, and Gmail with the free plugin; Amazon SES and Microsoft SMTP come with the Pro plugin.

And, if all of this SMTP stuff makes your head hurt, you can sign up for the Elite plan and get White Glove Setup to have an expert from their team set up your SMTP service for you.


  • Instead of having different SMTP plugins and workflows for different SMTP providers, WP Mail SMTP brings them together into one
  • Works with all the best email sending services
  • Native Microsoft and Amazon SES integrations (Pro)
  • Full control over which email notifications WordPress sends (Pro)
  • Backed by the WPForms team


  • WordPress multisite isn’t fully supported (though there are workarounds)


WP Mail SMTP is a free SMTP service. However, they do offer premium versions starting at $49/year.

For more information, check out this post on how to set up SMTP for WordPress.

Constant Contact

constant-contact email marketing

Constant Contact is one of the most popular email marketing and SMTP services.

It comes with templates and a drag and drop builder to create stunning emails that convert. Plus, you can build your email subscriber list, manage your contacts, and track your progress.

Constant Contact is by far the most reliable email service on account of its high delivery rate of 97%.

It’s an excellent choice for beginners. Not only does it provides you with all the essential features you’ll need to grow your email list, but it also offers amazing customer support to help you resolve any issues.


  • Create high converting emails in minutes
  • Loads of integrated marketing and automation services
  • Real-time reporting and analytics
  • Advanced marketing tools such as custom web page, surveys and polls, and event management


  • While it does have advanced tools, it’s designed for beginners. So it may have fewer behavior targeting capabilities that advanced users would like.


You can use it as a free SMTP service for a month. After that, plans start at $20 per month based on the number of contacts you have.


sendinblue smtp services

Sendinblue is a popular email marketing service that also offers SMS marketing. In short, it’s an all-in-one marketing platform that also ranks as one of the best SMTP service providers on the market.

This SMTP email provider works great with WordPress and other marketing tools like OptinMonster, Google Analytics, and more.

Sendinblue has an extendable API and SMTP relay service that improves email delivery rates for transactional emails. That means more of your emails will go to your audience’s inbox rather than their spam folders.

Pricing plans are dependant on sending limits rather than the number of contacts. This gives Sendinblue a unique advantage for small businesses looking to scale.

The free version allows for up to 300 emails per day, which is plenty to get started. The next paid plan (Lite) starts at $25 and lets you send unlimited emails. The Enterprise plan unlocks even more features but requires you to get a quote from their sales team.


  • Inexpensive and competitive pricing
  • Variety of automation features for email marketing
  • Intuitive, easy-to-use interface
  • Customizable email templates
  • Email tracking for results optimization


  • Support is a bit on the slow side


The free SMTP service plan includes 300 emails/day. Paid plans start at $25/month. Logo is a leading SMTP service provider in the market that is used by over 100,000 businesses worldwide.

They offer a robust API to send transactional emails which seamlessly integrates with WordPress using the popular WP Mail SMTP plugin.

Because SMTP relay is the core focus of their business, they offer one of the best deliverability with high email volumes.

You get full reports on number of sends and views. Their domain reputation management features help ensure that your email always land in user’s inbox.

As a WordPress site owner, you can use to send automated site notification emails, registration emails, authentication emails, order confirmation from your WooCommerce store, status updates, etc.

Pricing: offers a 30 day free trial that allows you to send 50,000 emails. Their paid plans start from $25 per month. You can upgrade to the higher plan to get Dedicated IP and reputation defender addon.



Mailgun is a popular SMTP service provider for developers and businesses. They offer powerful APIs to send transactional emails.

It is easy to integrate into your WordPress website. Whether you are an eCommerce store, a membership website, or a small business, Mailgun offers an easy to scale SMTP service to send your marketing and transactional emails.

It is designed for developers and lacks some of the beginner-friendly features of other SMTP providers on the list.

Pricing: Mailgun offers a ‘pay as you go’ plan with first 5,000 emails free for the first three months. Their paid plans are fairly competitive in the market. However if you want a dedicated IP and improved deliverability, then it starts at $80 per month with 1 dedicated IP address.



SendGrid is a powerful cloud-based SMTP email service provider that allows you to send mass emails without managing an SMTP server. It offers higher scalability with a powerful set of features.

Their SMTP relay is easy to setup and works with any WordPress site. It includes delivery optimization tools, email analytics, email templates with a simple email editor, and integrations with third-party apps and services.

If deliverability is your main concern, then SendGrid offers great tools to further improve email delivery including dedicated IP addresses and domain name authentication tools.

Pricing: They offer a free plan with first 40,000 emails free and then 100 emails per day. Their paid plans start at $14.95 per month.


There are many benefits of using SMTP. Email marketers use this to send many emails. When you send an email, you want to make sure that your message is getting read. There are professional organizations which provide best smtp services for email marketing. They can help a user in many ways.

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