Mailjet uses an advanced anti-spam system to prevent emails that are likely to be marked as spam from being sent. This proactive approach helps protect your sender reputation and improves overall deliverability. If your email is identified as potential spam, it will be blocked before being dispatched.
How to Identify 'Spam Preblocked' Emails
If your email has been blocked due to spam concerns, you can check its status through the Mailjet dashboard.
Using the Campaigns Page
- Go to the Campaigns section.
- Click on Non-delivery, then select Blocked.
- Look for emails labeled as "spam preblocked".
- To analyze multiple blocked emails, download the CSV report and filter the reason column for "preblocked spam".
Using the Stats Page
- Navigate to Stats.
- Filter by Blocked emails.
- Click on an email’s subject line to view details.
- In the details column, check if the reason for blocking is "spam preblocked".
Common Reasons for 'Spam Preblocking'
Mailjet blocks emails that exhibit characteristics commonly associated with spam. Here are some potential triggers:
- Excessive capitalization: Using ALL CAPS in subject lines or body text.
- Overuse of punctuation: Avoid multiple exclamation marks (e.g., "Buy Now!!!").
- Spam-related keywords: Words like "Free", "Guaranteed", "Limited Offer", etc.
- Unbalanced text-to-image ratio: Emails with large images and little text.
- Suspicious links: URLs leading to blacklisted or low-reputation domains.
- High complaint rate: If recipients frequently mark your emails as spam.
How to Prevent Your Emails from Being 'Spam Preblocked'
To ensure your emails reach inboxes, follow these best practices:
Improve Email Content
- Write clear, engaging, and relevant subject lines.
- Avoid spam trigger words and excessive capitalization.
- Ensure a proper balance between images and text.
Authenticate Your Emails
- Implement SPF, DKIM, and DMARC authentication to verify your sender identity.
Maintain a Healthy Contact List
- Regularly remove inactive or unengaged subscribers.
- Ensure you have explicit permission from recipients to receive your emails.
Monitor Engagement Metrics
- Track open and click-through rates to assess engagement.
- Reduce sending frequency if engagement drops.
Additional Resources
- Avoiding Spam Filters: Best Practices
- Email Deliverability Guide
- Does the content have an impact on the deliverability?
By following these recommendations, you can improve deliverability and prevent your emails from being preblocked by Mailjet’s spam filters.