SpamAssassin is an open-source anti-spam tool that assigns a numerical score to indicate if an email is likely to be spam or not. It uses a wide range of heuristics to identify suspicious characteristics in an email and calculates a spam score accordingly.
The higher the spam score, the more likely an email will be classified as spam. A score above 5 indicates probable spam, while a score 2.0 or less suggests the email is likely legitimate.
For email marketers, being aware of and monitoring your SpamAssassin score is important for several reasons:
- Spam filtering – High spam scores mean your email is at risk of being marked as spam and filtered from your recipients’ inboxes. This reduces email delivery and open rates.
- Inbox placement – Even if emails aren’t filtered, higher spam scores could push your emails to spam folders or lower-priority inboxes. This hurts visibility.
- IP reputation – If you repeatedly send emails with high spam scores, it could get your IP address or domain blacklisted. This blocks all your emails.
- Engagement metrics – Spam filtering and poor inbox placement gives inaccurate engagement data like open, click-through and response rates.
- Compliance & regulation – Sending spam can result in fines or blacklisting and impact permission to send emails.
Optimizing email content and practices to keep spam scores low ensures better inbox delivery, metrics accuracy, and compliance for email marketers. It is an important indicator of send quality.
