Find out where your email gets stuck.
Three free checks for the places a good email goes missing: your DNS records, the blocklists, and the route it took. Type a domain or paste a header. No sign-up.
Domain Health Checker
Is your domain set up to send? We look up your SPF, DKIM and DMARC records and show which ones are there. One missing record can be enough to land in spam.
Check a domain →Blacklist Checker
Is your domain on a blocklist? We ask public lists like Spamhaus, Barracuda and SpamCop about your domain and its IP, and show you every answer.
Check blocklists →Email Header Analyzer
Did an email land in spam, or arrive late? Paste its raw headers. See the servers it passed through, how long each step took, and whether SPF, DKIM and DMARC passed.
Read a header →When a check comes back red
A check tells you what is wrong. Fixing it is the work.
DNS changes, a slow warm-up, getting off a blocklist. That is what our team does for the people we send for. If a result worries you, tell us and we'll look at it with you.
Want our team to look at your results?
Leave your email and we'll write back.
Rather not do any of this yourself?
Our team sets up your domain, warms it slowly, and sends your campaigns from servers we run ourselves.