CAN-SPAM compliance checker
The US CAN-SPAM Act requires a valid physical postal address, a subject line that isn’t deceptive, and an easy opt-out you honor within 10 business days. Paste your email or upload the .eml and we’ll flag the gaps in plain English. No signup, no data stored.
12 checks, in seconds
SPF authentication
DKIM signature
DMARC alignment
List-Unsubscribe header
One-click POST support
Visible unsubscribe link
Unsubscribe not gated
Physical mailing address
Honest subject line
Spam-trigger wording
Image-to-text balance
Link safety
Learn more
Gmail & Yahoo sender requirementsWhat bulk senders (5,000+/day) must do: authentication, one-click unsubscribe, and a low spam rate.RFC 8058 one-click unsubscribeThe exact List-Unsubscribe and List-Unsubscribe-Post headers, and how mailbox providers use them.CAN-SPAM checklistPhysical address, honest subject lines, and an opt-out you honor within 10 business days.