5 Best Free SMTP Servers

Are you looking for the best free SMTP servers to boost your email campaigns? If yes, then you have come to the right place.

Here, you get the free SMTP server list with username and password free, thereby ensuring that your emails reach the customer’s inbox.

Moreover, these reliable SMTP relay software offer maximum deliverability to you, thus saving your emails from getting caught in the recipient’s spam or junk folder. Further, this free SMTP server list gives you the option of choosing the most affordable & free SMTP server for your business.

Let us compare some features of the top free SMTP servers through a table.

Comparison Between 5 Best Free SMTP Servers

ServicesPricingNumber Of Emails External SMTPMultiple SMTP Routing
Pabbly Email Marketing$29/moUnlimitedYesYes

For further details about the cheap SMTP servers, read below.

Pabbly Email Marketing – Best Free SMTP Server

“Pabbly Email Marketing is the most reliable free SMTP server that comes with an in-built SMTP, offers unlimited emails, unlimited subscribers and much more.”

This is the first in our free SMTP server list as it is the cheapest SMTP service provider that does not restrict its users on any features. Pabbly Email Marketing comes with an in-built SMTP which assures 99% inbox deliverability.

Moreover, this free SMTP server also lets you connect to 50+ external SMTP vendors like Amazon SES, Gmail Apps, SparkPost, thereby increasing your contact list. Plus, the basic plan also offers all the advanced features like unlimited emails, SMTP routing etc.


  • Autoresponders: Send automatic welcome emails to new subscribers and follow-ups to non-opens, thus doubling your open rate.
  • Subscription Forms: Add subscription forms to your emails to turn casual email openers into frequent customers to enhance lead capturing.
  • Drag & Drop Tool: Use the in-built drag & drop tool to edit and design response-generating as well as professional-looking emails. Further, you can make use of automation templates to strengthen customer relations.
  • List Management: Use list-building tools to manage all your contacts in one place. Further, use advanced segmentation of this top SMTP server for Gmail to reach your customer’s inbox.
  • Track Email Activity: Monitors the activity of your users by tracking opens, clicks, bounces, non-opens and more.
  • MX Cleaner: Increase your delivery rates by removing spam, suspended, and bounce email contacts from your email list.
  • Limitless Integration: This unlimited SMTP server also allows integrations with several lead generation tools like Ninja Forms, Convertful, etc, resulting in maximum deliverability.


Pabbly Email Marketing offers different pricing plans, based on the number of subscribers-

  • Forever Free – Sign up and send 12,000 emails to 1,100 subscribers for FREE. This starter plan allows you to connect to 3 SMTP services for a month.
  • Rookie – Using this plan, send unlimited emails to 5,000 subscribers at $29/month. Additionally, enjoy the features of auto-responders, unlimited SMTP server free, auto follow-ups and much more.
  • Pro – It lets you send unlimited emails to 15,000 subscribers at $49/month. Also, make use of free SMTP relay with no authentication required, unlimited custom fields etc, thus enhancing your email deliverability.
  • Advance – By choosing this plan, you can connect with 50, 000 subscribers at $99/month. Moreover, you can get access to all the advanced features.
  • Enterprise – You can upgrade to meet high-volume demands, ranging above 10,00,000 subscribers. However, you need to contact the service provider to know about the pricing of this plan.