There are numerous reasons why emails might be flagged as spam:
Content Issues: Emails with excessive use of promotional language, all caps, and multiple exclamation points may be flagged. Sender Reputation: If your sender reputation is poor due to high bounce rates or spam complaints, emails are more likely to be marked as spam. Authentication: Lack of proper email authentication methods like SPF, DKIM, and DMARC can cause emails to be flagged. User Interaction: Low engagement rates, such as low open rates or high delete rates, can signal to email providers that your emails are not wanted.