--- title: "Ways to Choose SMTP Relay Free For Your Enterprise | DuoCircle" description: "Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in" image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/content/mail-relay-smtp/smtp-relay-free/" --- Content # Ways to Choose SMTP Relay Free For Your Enterprise Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in [ Talk to an Expert → ](/contact/) [ See what we make ](/products/) ## Ways to Choose SMTP Relay Free For Your Enterprise [Fix Your SPF Errors Now](/content/spf-permerror) _SMTP relay free servers use a TCP/IP protocol to allow businesses to transmit emails across the web seamlessly_. Many providers provide SMTP relay services free of cost. The [smtp relay Gmail](/content/mail-relay-smtp/smtp-relay-gmail) is **highly reliable** and one of the most widely used smtp services by businesses around the world. Another popular provider is SMTP relay O365. ![mail relay smtp](https://media.mailhop.org/duocircle/images/2020/05/gateway-spam.png) ### What Is SMTP Relay And Why Is It A Wise Choice For Business? _[What is SMTP relay](/content/mail-relay-smtp/what-is-smtp-relay) means, an SMTP relay is a piece of computing machinery that ensures that your email reaches the right email address across the world wide web_. Businesses rely on marketing to promote their products, and email marketing plays a massive role in their marketing strategy. While not every email will get converted into an order, you get a broader reach in quick time and without any additional cost. Hence the success of your business largely relies on email marketing, and therefore it is crucial to choose the best [mail relay SMTP](/content/mail-relay-smtp) to boost your marketing campaign. ### Two Methods Of Choosing SMTP Relay Free #### 1\. SMTP Relay Service (Third Party) A popular SMTP service available for free is the [third party](https://www.wpbeginner.com/showcase/best-smtp-service-providers-with-high-email-deliverability/) hosted [SMTP relay service](/content/mail-relay-smtp/smtp-relay-service). The main reason businesses avoid using these services is because the number of emails allowed per day is **very limited**. But if you don’t have a budget for paid services and are just starting with email marketing or want to test the waters about promotional and marketing emails, then _it is the best option for beginners_. #### 2\. SMTP Relay Service (Self Hosted) In this method, enterprises choose to self-host the SMTP server. But, _it may come at a cost because they need to set-up the complete infrastructure from scratch_, both hardware and software. ![smtp relay gmail](https://media.mailhop.org/duocircle/images/2020/05/hosted-email-gateway.png)![outbound smtp](https://media.mailhop.org/duocircle/images/2020/05/mail-filtering-service.png) ### Features Of A Good SMTP Relay Software - **Dedicated IP** address - Reliable and trusted service - Easy to use - A/B testing - Support for surveys and webhooks - Detailed reporting/analytics - API integration features To [avoid spammers](https://gbhackers.com/email-spoofing-exploiting-open-relay/) from exploiting the [open mail relay](/content/mail-relay-smtp/open-mail-relay) server of your enterprise, _configure your SMTP server so that it only sends mail from known IP addresses or domains_. Every business has different needs. You need to choose an SMTP relay service that suits your requirements. It must be **easy to integrate** with other applications, and must also work without any hassles. Or, you can choose to self-host an SMTP relay free server for your organization. ##### Join the thousands of organizations that use DuoCircle --- Find out how affordable it is for your organization today and be pleasantly surprised. [Outbound SMTP - Sign Up FREE](/email/outbound-smtp)Interested in our Partner Program for MSPs and VARs? Visit Our [MSP Partner Program](/msp-partner-program). ## Ready to talk? Same-day response from someone technical. We tell you yes or no quickly. If yes, we get to work. 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