Spam Filters Only Block Incoming Emails
Phishing emails are always changing, making it difficult for people to recognize them. Spam filters use algorithms to constantly monitor and detect email spam trends. When an email ticks enough boxes on their list to raise suspicion, the filter marks it as spam and blocks it.
While spam filters have gotten very good at their job, they’re still only meant to do one thing. Reject incoming spam email. They don’t do anything about emails sent from your domain, which means an attacker could still impersonate your brand to send phishing emails to the public.