Email security: how to avoid the spam folder and protect your data

Having professional email is pointless if your company's messages never reach the customer — or worse, if they land straight in the spam folder. The good news is most email deliverability and security problems have well-known fixes, and none of them require advanced technical knowledge.

Why emails end up in spam

Email providers (Gmail, Outlook, etc.) use technical criteria to decide whether a message is trustworthy. Poorly configured servers, missing domain authentication records, or a history of messages flagged as spam by other users hurt your domain's reputation — affecting every mailbox in the company, not just one.

Anti-spam filters work both ways

Besides making sure sent messages reach their destination, you also need to protect the inbox from incoming spam. Well-configured anti-spam filters block most phishing attempts before they even reach the team's inbox, reducing the risk of scams and malicious links.

Strong passwords and aliases make a difference

Email accounts with weak or reused passwords are the most common entry point for break-ins. Using aliases — alternative addresses linked to a main account, like sales@yourcompany.com forwarding to a salesperson's inbox — also helps organize message flow without exposing each employee's personal address.

Backups prevent permanent message loss

Mistakes happen: an employee might delete important messages by accident, or an account could be compromised. Having backup routines for email accounts ensures the history of conversations with customers is never permanently lost.

Security certificates matter too

A valid SSL certificate on the domain doesn't just protect the website — it's also part of the set of signals email providers evaluate to consider a domain trustworthy, helping messages get delivered properly.