Is your domain ready to send?
Check SPF, DKIM, DMARC, MX and reverse DNS in seconds. When something is wrong, you get the record to add.
What each check means
A TXT record that lists the servers allowed to send for your domain. Without it, anyone can claim to be you.
A signature added to every email, checked against a public key in your DNS. It proves the message was not changed on the way.
Tells inboxes what to do when SPF and DKIM fail, and where to send reports. Gmail and Yahoo require it for bulk senders.
Where mail for your domain is delivered. Without it, replies and bounces have nowhere to go.
The name your sending server’s IP address points back to. Many servers distrust an IP without one.
Public lists of addresses that sent spam. Being on one sends your mail to junk — or stops it completely.
Questions
Yes. There is no sign-up, and we do not keep the domains you check. A fair-use limit stops automated abuse.
The SMTP server your email leaves from — for example smtp.gmail.com, smtp.office365.com or your web host’s mail server. Add it to also check reverse DNS and its IP on the blocklists.
DNS changes can take from a few minutes to a few hours to spread. Results here are also kept for 10 minutes. Check again a little later.
We look for the most common selector names (default, google, selector1, selector2, k1, s1 and more). If your provider uses its own name, check it in their dashboard.
Yes. If you are a client, we will set the records up for you — email [email protected].
More free tools
Check this before every send — automatically.
Devlo checks your domain and blocklists before each campaign and warns you while there is still time to fix it.
Ready togrow smarter?
Bring your list, we'll bring the deliverability. Set up takes an afternoon, and the Free plan stays free.