Disposable Email Checker.
Detect temporary burner emails, 10-minute inboxes, and rotating alias domains via registry heuristics and live DNS MX inspection.
How this detector evaluates domains:
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Build syntax-valid DMARC TXT policies with DNS provider guides.
Simulate mobile inbox truncation and optimize cold email subjects.
Verify SVG Tiny-PS logos, VMC certificates, and DMARC alignment.
Highlight spam triggers and swap in inbox-safe phrasing.
Disposable Email Detection FAQs.
Stop fake accounts, free-trial abuse, and hard bounces caused by temporary throwaway inboxes.
Why do disposable emails damage my sender reputation?
Throwaway addresses expire within minutes or hours. Sending follow-up campaigns to expired burner domains causes hard bounces that lower your domain trust across Gmail and Outlook.
How does Sortwell detect newly created burner domains?
Single checks combine static domain matching, heuristic pattern inspection, and live DNS MX queries to catch custom domains routed through disposable mail exchangers.
Are Apple Hide My Email or DuckDuckGo relays flagged as disposable?
No. Privacy forwarding relays (privaterelay.appleid.com and duck.com) forward to real user inboxes and are classified separately from abusive burners.
Clean your entire email list with zero bounces.
Sortwell checks addresses the way a mail server would — live SMTP handshake, syntax, MX verification, and spamtrap detection.