How to Avoid the Spam Folder Using Mailmeteor’s Spam Checker

Published on May 8 2025 by Eric Bouchard

If you're sending cold emails, landing in the spam folder is one of the biggest obstacles you'll face. Even well written, personalized messages can get flagged, especially if your setup isn't solid. That's where tools like Mailmeteor's Spam Checker can help.

This guide walks you through how to use it effectively and how to improve deliverability overall.

Why Emails Go to Spam

Before jumping into solutions, it's important to understand what typically causes emails to be filtered:

• Your domain isn't authenticated properly (missing SPF, DKIM, or DMARC)
• You're using language or formatting that triggers spam filters
• You're sending from a domain or IP with a poor reputation
• Your email has too many links or images and not enough plain text
• You're sending too many emails too quickly without warming up

What Mailmeteor’s Spam Checker Does

Mailmeteor offers a free tool that lets you test your email content and sender setup before sending. You simply paste in your message, and the tool checks for:

• Spammy language
• Unsafe or suspicious links
• Domain and IP reputation
• Whether your domain is properly authenticated
• Formatting issues that might affect deliverability

You can try it here: https://mailmeteor.com/spam-checker

How to Use It Effectively

1. Write your email first
   Draft your email naturally keep it simple, plain text if possible, and personalized. Avoid too much salesy language or over formatting.
2. Paste your email into the tool
   Use the checker to identify potential red flags. It will highlight anything that looks suspicious to spam filters.
3. Fix the flagged issues
   This might mean changing your subject line, removing certain words, or cutting back on the number of links.
4. Authenticate your domain
   Your SPF, DKIM, and DMARC records should be properly set up. This is non-negotiable if you're doing any volume of cold email.
5. Avoid sending too fast
   If you're sending from a new domain, start slow. Don’t send hundreds of emails on day one. Gradually increase your volume over time while monitoring performance.

Additional Tips

• Avoid using all caps or excessive punctuation
• Don’t include too many links, and avoid public URL shorteners
• Use a consistent "From" name and email address
• Personalize your emails when possible
• Keep your messages clear, brief, and relevant to the recipient

Final Thoughts

Deliverability is critical in cold outreach, and staying out of the spam folder starts with how you structure your emails and how you configure your sending domain. Mailmeteor’s spam checker is a good place to start, but it’s just one piece of the puzzle.

If you're looking for a more hands off way to avoid deliverability issues, our cold email platform takes care of the technical side for you. We send emails using pre-warmed IPs and verified sending domains, so you don’t have to worry about warming up or configuring complex DNS settings. It’s designed to help you reach inboxes, not spam folders.

Interested? Try our tool with a 7 day free trial