Email domain checker: is your domain ready for cold email?

The DNS records and reputation signals that decide whether your mail is accepted: MX (can the domain receive replies), SPF (which servers may send for it), DKIM (the signature on each email), DMARC (what receivers do when those fail), blacklists for the domain and its mail servers, and how old the domain is.

Yes. It needs no signup and no card. Type a domain and the full report opens in about two seconds. Ballast runs the same check every day on the domains you send from.

Gmail and Yahoo require all three from bulk senders. Without them your emails are more likely to land in spam or be rejected, and anyone can send mail that looks like it comes from your domain.

23 common selectors, which covers Google Workspace, Microsoft 365 and most email services. If yours is custom, type it in the form and the checker looks it up.

Not safely. A domain younger than 30 days needs a warm-up first, and the report says so. Set up the records, connect the mailbox and let warmup run before the first campaign.

The report names the list and what it means. Some listings are about the domain, some about the mail server's IP, and the fix differs. Stop sending from the domain until you know which one it is.

Results are cached for ten minutes so a repeat check is fast. A result page isn't indexed by search engines, and the checker only reads public DNS records and public blacklists.