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Email Header Analyzer
Paste raw email headers for a decoded, human-readable analysis: sending server, authentication results (SPF/DKIM/DMARC), hop-by-hop delays, spam score indicators, IP reputation, and TLS status.
In Gmail: Open email → three dots → Show original → Copy all headers
coldBirds auto-configures DKIM for every mailbox and monitors authentication every 6 hours. Failures get caught and fixed before they reach your prospects.
See How Auto-Healing Works →You Might Also Need
Domain Health
Get an instant health score for any email domain — SPF, DKIM, DMARC, MX records, and blacklist status.
Blacklist Checker
Check your domain or IP against 100+ email blacklists with delisting instructions.
Inbox Placement
Test where your emails actually land — Primary inbox, Promotions, Spam, or Not delivered — across major providers.