Free tools
Free email tools for developers
Practical, no-signup utilities from the team building email infrastructure for AI agents. Everything runs instantly; the DNS and header tools never send your data to a server.
Use the SPF, DKIM, and DMARC checkers to debug why mail lands in spam, the email header analyzer to trace a message's delivery path and authentication results, and the fake email generator to grab a disposable inbox for a quick signup or OTP test. Each tool runs in your browser and needs no account.
Fake Email Generator
Create a free disposable inbox
Generate a real, working throwaway email address in one click. Watch messages arrive live, then let the inbox self-destruct after an hour.
SPF Record Checker
Check any domain's SPF record
Look up and validate a domain's SPF record. See every mechanism explained and catch the misconfigurations that hurt deliverability.
DKIM Record Checker
Verify a DKIM selector
Check whether a DKIM public key is published for a domain and selector, and see the record broken down field by field.
DMARC Record Checker
Inspect a domain's DMARC policy
Look up a domain's DMARC record and understand its policy: none, quarantine, or reject, plus reporting addresses and coverage.
Email Header Analyzer
Trace and inspect raw email headers
Paste raw email headers to trace the delivery path hop by hop, check SPF/DKIM/DMARC results, and spot spoofing red flags. Runs entirely in your browser.
Need this as an API? AgenticEmail gives your scripts and agents real inboxes with sending, receiving, webhooks, and automated SPF/DKIM/DMARC setup — start in the docs.