We know the importance of emails that move across your server could contain highly sensitive data. It is very important to secure such highly sensitive personal data with robust security. It is included in current regulations that a server should be secure enough to keep such private data protected from hackers and malware.
There are some easy steps that users can take from their end to avoid such malicious attacks. Check the following steps to ensure your email server’s security.
Configure mail relay
It is very important to configure your mail relay parameter to restrict the communication with unknown sources. Nowadays almost all mail server comes with this option, where you get an option to specify which domains or IP addresses your mail server will relay mail.
SMTP helps to prevent open relay and abuse of your server. When it is configured correctly, only reliable accounts can use your servers SMTP to send or receive emails. This configuration is highly recommended when your mail server has a routed IP address.
Maintain local IP blacklists
Blacklisting your local IP adds extra layer of security to your mail server. Also, it helps to speed up the process by stopping the unknown internet connections from bothering your messaging system.
Encrypt POP3 and IMAP authentication
Initially POP3 and IMAP connections were not built with privacy and safety concerns, which was causing safety issues. Also, many users create weak passwords which can be predicted by hackers very easily. But the encryption of textual form of password makes it more secure.
Activate Reverse DNS
A reverse lookup is also an interesting option for fighting off unauthorized mail senders. Once Reverse DNS Lookup is activated, your SMTP verifies that the senders IP address matches both the host and domain names that were submitted by the SMTP client in the EHLO/HELO command.