Find risks
Every record for a domain, blocklists for an IP
Every domain your email depends on
Names registered to look like yours
Fix records
Tick who sends as you, get the records
Safe, tested steps to refuse forged mail
Preview an edit before you publish
See who has your new record yet
Read your mail
Paste headers to see a message's route
Provider XML reports, made readable
Many domains
Up to 25 domains in one table, worst first
Up to 4 domains side by side
README badge, JSON and a CI check
Reading DNS…
Reverse DNS
No reverse DNS. Mail servers without it are often refused.
Clear on all 6 lists.