Works with Mailchimp
Spam Score Checker for Mailchimp: Free Online Tool
→ Open the free Spam Score CheckerNo signup. 5 free checks a day. Works with any Mailchimp campaign.
Mailchimp's built-in tools cover the basics, but the spam score checker workflow often benefits from a dedicated check before sending. Pre-send spam-trigger analysis catches issues before they impact your sender reputation. Free rule-based scoring combined with a Naive Bayes classifier identifies precisely which content triggers fire.
Why pre-process before uploading to Mailchimp
Mailchimp's Inbox Inspector requires a paid Standard plan ($20+/month). Free Mandrill/Standard users get no pre-send spam scoring.
Step-by-step: spam-trigger analysis for Mailchimp
- Paste your campaign HTML into the free SpamCipher spam score checker
- 60+ rules evaluate subject patterns, body keywords, header completeness, link density, HTML structure, image-to-text ratio, and authentication signals
- A Naive Bayes classifier trained on 50,000+ labeled messages provides a complementary spam-probability score
- Review the rule-by-rule breakdown and fix triggers before sending via Mailchimp
Mailchimp-specific deliverability quirks to know
Mailchimp clips messages above 102 KB of HTML, hiding the rest behind a 'View entire message' link in Gmail. Aggressive image compression is required for promotional emails.
Frequently asked questions
Does Mailchimp include a built-in spam score checker?
Mailchimp provides basic functionality but lacks granular control. Mailchimp's Inbox Inspector requires a paid Standard plan ($20+/month). Free Mandrill/Standard users get no pre-send spam scoring.
Is there a free way to spam-trigger analysis for Mailchimp campaigns?
Yes. The free SpamCipher Spam Score Checker scores the HTML you paste against 60+ spam rules and an AI classifier, with no signup and 5 free checks a day. Fix what it flags, then send the campaign from Mailchimp.
What image size limit does Mailchimp enforce?
Mailchimp accepts uploads up to 1000 KB per image and recommends a max width of 600px for email body width. Supported formats: JPG, PNG, GIF.
Does Mailchimp verify SPF, DKIM, and DMARC automatically?
Mailchimp requires SPF + DKIM authentication via their hosted authentication — DMARC alignment is your responsibility.
What about subject line analysis for Mailchimp?
Mailchimp's Subject Line Helper is AI-based but limited to existing campaigns. External analysis lets you test variants before creating the campaign. Use the free subject line analyzer for length scoring, spam-trigger detection, and sentiment analysis before pasting into Mailchimp.
Related free tools
While preparing your Mailchimp campaign, you may also want:
- Image Compressor — also free, browser-based, optimized for email marketers
- GIF Compressor — also free, browser-based, optimized for email marketers
- CSS Inliner — also free, browser-based, optimized for email marketers
- Inbox Preview — also free, browser-based, optimized for email marketers
Spam Score Checker also works with
