An email account is as important as a website for a business. It is a door to the internet, which allows you to communicate with your internal and external stakeholders with ease. However, it is also a door that can be misused by hackers and other online threats to gain access to your system. Hence, it is important to ensure that your Email Hosting server enjoys the highest level of security. Today, we will share five best practices to help you secure your Email Hosting server.
1. Use SMTP authentication
Simple Mail Transfer Protocol or SMTP Authentication or SMTP AUTH is a primary requirement to secure your Email Hosting server. Under SMTP AUTH, users are required to request permission to send an email by logging in using a username and password. By configuring this correctly, you can ensure that only known people use your servers to send emails. This is especially important if your email server has a routed IP address.
2. Limit the number of connections
Your Email Hosting server has limited resources. Therefore, you must ensure that you limit the number of connections to your SMTP server. You can choose the limits based on the available resources and how much load the server can handle. Focus on limits for the following:
- Total number of connections
- Total number of simultaneous connections
- Maximum connection rate
You might have to revisit these limits regularly based on your usage. These limits can help keep Denial of Services (DoS) attacks at bay.