How to check spam score pre-send (e.g., Mail-Tester, Glock)?
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Pre-send spam testing catches problems before they hit your whole list. Here's the workflow: you draft your email, send it to a special test address (like Mail-Tester's unique inbox or GlockApps' seed addresses), then get a report scoring your authentication, content, and blocklist status. Takes 10 minutes and saves potential disaster.
These tools check the dimensions that matter for deliverability: your SPF, DKIM, and DMARC authentication setup, whether you're on major blocklists (Spamhaus, Barracuda), HTML quality, link validity, and content red flags. Some services actually send your email to real seed accounts at Gmail, Outlook, and Yahoo to see where it lands. inbox, spam folder, or blocked. That real-world data beats predictions.
Make it routine. Before you send a new template, new sending domain, or unusual campaign content, run a test. Mail-Tester scores 0-10. Aim for 9-10. Below 7 means something needs fixing before you send to your real list. Don't know what to fix? Each tool explains the failures. Blocklist issues require immediate attention. Header problems are usually quick fixes in your ESP. The 10 minutes upfront beats scrambling after a delivery crash.
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