For most companies, email is still the leading communication channel. While communication tools like Slack and VoIP solutions have made an impact on modern business, email still plays a vital role in enterprise communications.
According to cybersecurity firm Fortinet, online scams increased by more than 400% during the pandemic. Google also blocked more than 18 million malware and phishing emails about COVID-19 every day in March 2020.
This makes it vital to take steps to ensure email security. After all, business email accounts are prime targets for threat actors. Whether it’s social engineering attacks or ransomware attacks, email is often the chosen mode of exploitation.
So how do you prevent malicious actors from breach your enterprise email system?
In this blog post, we’ll explore the top 5 things you need in email security.
1. Leverage Encryption Technologies
Encryption is like an insurance policy. Even if you don’t prevent a data breach, the data stolen by hackers is rendered meaningless with the right decryption keys.
As corporate email often includes highly sensitive information, email encryption is key to keeping all communication confidential. Email encryption also ensures that your communications aren’t altered during transit.
Google’s Gmail and Microsoft Exchange have TLS encryption. However, this isn’t enough to secure your communications. To better secure your emails, use tools like CTemplar, which is open-source and leverages both OpenPGP and TLS to protect emails in transit and at rest.
Such tools also protect users from JS injections used to deliver malicious codes. It’ll also help your company become more resistant to Man-in-the-Middle attacks.
Managed services providers often have a number of encryption solutions for you to choose from. So, make sure to discuss this with your managed services provider before committing.
2. Enforce Password Security
While it isn’t always the best, passwords remain your primary line of defence against unauthorised access. However, passwords are only as good as you make them.
By enforcing an enterprise password policy, you can ensure that employees follow best practices and create strong passwords. This approach ensures that staff don’t inadvertently create unnecessary vulnerabilities in the network that lead to major security incidents.
However, don’t stop there. Add another layer of security in the form of multifactor authentication (MFA).
3. Implement MFA
Having a strong password helps, but it’s not enough. To take email security to the next level, ensure that all employees use MFA. In this scenario, MFA adds another layer between your enterprise data and cybercriminals.
Whenever you have deployed MFA in your email systems, users must verify their password with another piece of information like a code from Google Authenticator.
This code or PIN is sent to another connected device like a smartphone. As a result, this makes it nearly impossible for hackers to breach the email system without having the device in their possession.
4. Integrate Robust Antivirus, Anti-Ransomware, and Anti-Phishing Solutions
Even though antivirus software might seem old school and obsolete, it’s still a good idea to install it on your corporate computers. Security software like these scans all emails before a single bit of data is downloaded.
You should also install a robust anti-phishing solution to complement your antivirus and anti-ransomware software. Whenever in doubt, it’s best to discuss your email security options with your managed services provider.
5. Create a Security Culture within the Organisation
Regardless of all the security tools deployed in your enterprise infrastructure, humans remain the weakest link. The best way to mitigate risk is to train your staff regularly. When you do this frequently, staff are alert to potential threats.
Email security training must cover topics like:
- Always using strong passwords
- Avoiding public WIFI
- Not opening suspicious attachments
- Not sharing personal details and passwords (even with colleagues)
- Not using business emails for private communications
- Social engineering (including phishing attacks)
- Using MFA
At AU.IT, we’re highly experienced in ensuring email security. To learn more, reach out to one of our in-house security experts.