Tools

Each one answers a single question by measuring your domain live. Free, no sign-up, nothing stored.

Check an SPF record

Reads the live SPF record for a domain, checks the enforcement policy, and counts the DNS-querying mechanisms against the limit that silently disables SPF entirely.

Check whether your domain can be spoofed

Anyone can put your domain in the From: field. What stops the message being delivered is a DMARC policy telling receivers to reject it. This checks whether yours does.

Check why your email lands in spam

Most spam-folder problems that come from configuration — as opposed to content or sending reputation — are visible in DNS. This checks the authentication records that receivers use to decide, and tells you which are missing.