Authentication & Security Tools

Validate the syntax of an SPF record, check for the 10‑lookup limit, and flatten nested includes. Improve email deliverability by fixing SPF errors.

Email authentication email record SPF validator

Generate a DKIM DNS record from a public key and selector. Check syntax. Improve your domain’s email deliverability.

Network authentication DKIM DNS email

Paste raw email headers and see authentication results (SPF, DKIM, DMARC) in a readable table. Find spoofing attempts.

Network authentication email headers SPF

Create an HMAC (Hash‑based Message Authentication Code) using SHA‑256 or SHA‑512 with a secret key. Verify data integrity. Local.

Generator authentication generator HMAC SHA‑256

Build a valid SPF TXT record by selecting mail servers, IPv4/IPv6 ranges, and includes. Validate syntax and get ready‑to‑publish output.

Network authentication DNS email SPF

Tag: Authentication & Security Tools