Why Microsoft Users Need an Office 365 SMTP Gateway

An SMTP gateway service is a hosted mail server that delivers emails on behalf of their clients. Companies that have trouble delivering their emails efficiently can use an SMTP gateway service to send their emails more reliably. An SMTP gateway is also beneficial as it can secure your network and also identify compromised accounts and scripts.

Why Do You Need an Office 365 SMTP Gateway?

If your SMTP client submission is not compatible with your business needs or with your device. You cannot use direct sending option as you must send email to external recipients

SMTP relay lets Office 365 relay emails on your behalf by using your public IP address (or a certificate) to authenticate SMTP relay with Office 365. To do this, you’ll need to set up a connector for your Office 365 account.

Setting up office 365 with connectors – After Office 365 subscription and configuration, you need to set up Office 365 to accept all emails on behalf of your organization. For this purpose, you will need to configure connectors and then point your domain’s MX (mail exchanger) record to Office 365. To prepare for this scenario, you must create a send connector in the form of smart hosts in your on-premises Exchange environment. Due to this connector, a mailbox in Office 365 can send emails to a mailbox in your on-premises Exchange server. You might also need to configure your Exchange server to accept messages delivered by Office 365. 

In order to create a connector in Office 365, click Admin, and then click Exchange to go to the Exchange admin center. Next, click mail flow, and click connectors. Click Add, and follow the instructions in the wizard to create a connector from Office 365 to your on-premises Exchange servers.

25% Less Support Tickets – By using the services of an office 365 SMTP gateway, you won’t have much issues with email delivery.

Send Large Volume Emails – Office 365 limits the max sending limit to 1500 emails per day. With the help of an Office 365 SMTP relay, sending large amounts of emails is possible and your emails will not end up in spam or get stuck in small sending limits. An SMTP gateway doesn’t let you end up in the blacklist and cost you precious time.

Anti-Spam Capabilities – An SMTP gateway service is run by anti-spam experts, this is why you do not have to worry about spam. All email services are scanned and detected and blocked.


As long as you authenticate your devices properly there will be countless applications from an SMTP gateway. THere are plenty of SMTP gateway services out there, look around and make sure that you find the best one before opting in.