Is the search for the best SMTP relay services driving you crazy? If yes, then you can sit back and relax as we had already done all the heavy lifting for you.

Best SMTP Relay Services

When it comes to making an email campaign effective, people call out for more salutary SMTP services that provide better deliverability rates. Email marketer who sends out thousand of the transactional, newsletter or promotional email in a day understands the pain of when emails get spammed. The reason for the same is, delivery engine clogs the bandwidth and potentially delays the sending of emails which often lead to mistakenly labeled as spam.

And, that’s where SMTP relay comes in the picture as it offers high inbox deliverability plus also saves you from email delivery issues like blacklisting, spoofing, and fishing. Along with that, it makes sure that the reputation of your domain always stays on top.

But, the biggest riddle is what are the features that make SMTP relay services worth remembering. Here’s a checklist that might benefit you.

  • Allow sending of thousands of emails
  • Delivery of mails through dedicated IP addresses
  • Prevent blacklisting of servers
  • Provides an updated report of delivery of emails

Luckily, the market is abundant with free and cheap SMTP relay engines, yet here we have narrow down the budget-friendly SMTP relay services in the market.

Quick Comparison Between Best Smtp Relay Services
ServiceBasic Plan SMTP RoutingWorkflow AutomationNumber Of Emails
Pabbly Email Marketing$29/mUnlimitedUnlimited
Sendinblue $25/m40,000

Now, let’s dive deep into the features and pricing of the aforesaid software.

1. Pabbly Email Marketing – Best SMTP Relay Service

“Avail unlimited emails, workflows, 99% inbox deliverability, and much more using the software even in its starter plan.”

Pabbly Email Marketing is the cheapest and affordable email marketing service that provides SMTP relay for sending bulk emails. The software comes up with an in-built SMTP that makes sure each and every mail of your campaign lands in Inbox. Further, it offers an external delivery engine like Amazon SES, Sparkpost, etc where you can divide  your bulk emails on a flat or percentage basis which protects your domain reputation and chances of emails get spammed will be minimum

Besides this, the tool escalates the campaign success rate by providing 99% inbox deliverability which makes it stand alone in-crowd. Not just this, with its 2X open rates, you can achieve high click-through rates by sending trigger mails for unopened emails. Using, the software you can schedule your emails too.

In addition, Pabbly Email Marketing is a bundle of joy as it offers limitless features like A/B testing, load balancing, integrations, and so on even in its basic plan which other email marketing services restricts.

Pabbly Email Marketing - Best SMTP Relay Service


  • SMTP Routing – The most unique feature of the software that offers bulk emailing using multiple SMTP relays like Postmark, Mandrill, and much more that doesn’t put a brake on mass emailing. It also helps in removing all sorts of server related issues.
  • Autoresponder – Autoresponder allows you to automatically respond to customer’s queries or sending trigger emails based on actions.
  • List Splitting – If your email campaign has a vast list of subscribers then you can easily break into subgroups for better results using list splitting feature.
  • Advanced Reporting – The advanced reporting parameter of software keeps you on top of the subscriber’s type of browser, operating system, device, and country.
  • List Cleaning – This feature of the software performs the cleaning action by removing all the bad, invalid, and fake email addresses.
  • Import Emails – Using it, you can easily import the subscriber list from your old email marketing service into the software.
  • Subscriber Segmentation – With the help of it, one can segment the subscribers and perform actions based on customer’s preferences.
  • Subscription Form – By embedding sign-up forms on the website, you can generate a list of genuine subscribers.
  • Email Tracking – It monitors every email of the campaign and analyze the success of each email in real-time.
  • Enhance Lead Capture – Further, the tool helps in generating leads.


  • Forever Free – The forever free plan lets you send 12000 emails to 1100 subscribers at a cost of $0/m.
  • Rookie – Further, the next plan of the software which is a rookie costs you $29/m for unlimited emails to 5000 subscribers.
  • Pro – Next, the pro plan will cost $49/m for unlimited emails to 15000 subscribers.
  • Advance – Again, the advance plan will cost $99/m for sending unlimited emails to 50,000 subscribers.
  • Enterprise – Lastly, the enterprise plan is best suitable for business with high needs. To avail of this, you have to contact the sales team of the organization.

Note – In a yearly plan, the user will get a 20% discount on all the prices.

2. Sendinblue – Versatile SMTP Relay Provider

Next, we are rolling out another affordable SMTP relay service which is Sendinblue that allows sending of transactional and promotional emails to a subscriber using its SMTP server. It not offers bulk emailing but also gives the flexibility to send mass SMSes. Additionally, the software is swamped up with features like inbuilt drip newsletter function, CRM and many more to boost email marketing.

Sendinblue - Versatile SMTP Relay Provider


  • Transactional Email – It allows you to send transactional emails to all the subscribers based on their actions performed.
  • Contact Management – With the help of it, one can manage the subscriber list based on their preferences.
  • Campaign Reports – The software provides heatmaps and click-through reports of the active campaign.
  • Segmentation – Segment your email campaign subscriber list based on the action, statistics, and ratings.
  • Retargeting – It is the most crucial aspect of an email campaign to bring the customer by showing advertisements.


  • Free – The free plan will cost $0/m for 300 emails/day.
  • Lite – Moreover, the lite plan costs $25/m for 40,000 emails.
  • Essential – Next, the essential will cost $39/m for 60,000 emails.
  • Premium – Furthermore, in the premium plan, one can send 120,000 emails at the cost of $66/m.
  • Enterprise – Atlast, the enterprise plan is a quote based on business with higher needs.

3. SendPulse – Affordable SMTP Relay Platform

Now, let’s shift our focus on third SMTP relay service which is SendPulse that is best known as a multi-channel marketing platform. The software sends a web push notification to all the potential customers and stimulates them for purchase. Additionally, the tool is cooped up with features like CRM and CMS systems that keep track of campaigns and provides you a detailed report.

Sendpulse - Affordable SMTP Relay Platform


  • Reporting – Reporting feature of the software gives a detailed statement of opens, clicked, unsubscribed, or errors.
  • Resend To Unopened – Using it, you can resend the emails with a catchy phrase to bind the user’s attention.
  • A/B Testing –  It helps in dissecting the email subscriber list and come up with parameters to boost the email campaign.
  • Trigger Emails – With the help of trigger email features, users can nurture leads, send relevant emails, and improve the strategy of the campaign.
  • Integrations – The software offers more than 40+ integrations that involve Salesforce, Drupal, etc.


  • The free plan charges $0/m for sending 15,000 emails to 500 subscribers.
  • Again, it charges $8/m for sending unlimited emails to 500 subscribers.
  • Furthermore, for sending unlimited emails to 1000 subscribers it charges $12/m.
  • Subsequently, it charges $35/m for sending unlimited emails to 5000 subscribers.
  • Finally, the highest plan charges $7000/m for sending unlimited emails to 5,000,000 subscribers.

4. Pepipost – Fastened SMTP Delivery

Following our list, we have Pepipost, another SMTP relay service that offers lightning-fast email delivery. The thing which is lovable about the software is it only charges for opened emails. And, the tool is distinct as it allows bulk emailing from both SMTP relay or HTTP API. Above all, it is enclosed with features like dedicated IPs, email /SMTP integration, and much more.



  • Artificial Intelligence – As the name suggested this feature of the software makes sure the delivery of emails in the smartest way.
  • Security – Using Pepipost as your email marketing tool, you don’t have to worry about data as it allows the third party to do security check-ups from time to time.
  • Bounce Forwarding – With the help of it, you can stay top on spammed or blocked emails as it sends triggered emails.
  • Email API – Integrate the email API in seconds and start delivering promotional emails. Further, this feature saves a lot of time.
  • Subaccounts –  It lets you manage multiple accounts and email domains at the same place.


  • At the price of $25/m, users will get 150,000 emails.
  • Again, at the price of $85/m, users can send 400,000 emails.
  • Next, the most popular plan of software cost $145/m where you can send 600,000 emails.
  • Furthermore, at the cost of $245/m, users get 1,000,000 emails.
  • Finally, the highest plan costs $445/m for 2,000,000 emails.

5. Mailjet – Flexible SMTP Service

Finally yet importantly we have Mailjet, one of appreciative SMTP relay services that render powerful transactional and marketing email solutions. Using the software, one can easily enhance the traffic while keeping an optimal quality of service. Further, it is locked up with advanced features like statistics, multi-user collaboration, and so on.



  • Email Builder – Using the email builder, one can create and customize beautiful emails in a fraction of time.
  • Contact Management – Manage your contact list by segmenting the customers with similar interests and behavior.
  • Deliverability Expert – With the help of it, one can take most out of the email campaigns as it ensures high inboxing of emails.
  • Analytics – Further, it comes up with actionable analytics that provides a report of opened, clicked, bounced, and spammed emails.
  • Documentation – To know about the software better, it offers documentation discussing all the relevant information.


  • Free – The free plan gives users 6000 emails at $0/m.
  • Basic – Again, the basic plan will cost $68.95/m for 150,000 emails.
  • Premium – Consequently, at a price of  $96.95 users will get 150,000 emails including a strategy to leverage your mails.
  • Enterprise – To try your hands on the enterprise plan, users have to reach out to an expert to decide the customized plan.

Conclusion –

That’s all! We hope that you found this article about the best SMTP relay services informative and helpful. In today’s competitive world, every marketer wants its campaign to be a huge hit and that’s only possible using SMTP relay services as it offers high inbox deliverability. Considering the same, we compiled the list of effective services.

Okay!  So opt for the services that go well with your business needs.

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