Is Your Spam Email Filter Blocking Important Business Emails?

Category: Tech Tip | Published: 2026-03-26

The Hidden Cost of an Overzealous Spam Email Filter

Spam email filters exist for good reason. They block phishing attempts, malware-laden attachments, and the relentless flow of unsolicited messages that would otherwise fill your inbox. But they have a problem: they sometimes get it wrong, and when they do, the consequences for a business can be more serious than most people realise.

A new customer enquiry sitting in your junk folder for three days is a lost opportunity. A supplier invoice marked as spam can trigger a late payment. A time-sensitive message from a new contact can cause delays that damage a professional relationship. These are not edge cases. As spam email filters have become more sophisticated and aggressive, the rate of false positives has risen alongside them, and many businesses are not in the habit of checking regularly enough.