Deliverability diagnostics
Find out why your email isn’t landing.
Mailvry queries your DNS the way a receiving mail server does, then tells you what is wrong and the exact record to publish. Free, no account.
Runs SPF, DKIM, DMARC and MX in one pass. Try or
Run a single check
All 17 tools →How a receiving server decides
Every inbound message is checked against three DNS records before a mailbox provider decides whether to deliver it, file it as spam, or reject it.
SPF
Is this server allowed to send for you?
A TXT record listing which servers may send mail for your domain. The receiver compares the connecting IP against it, resolving at most ten DNS lookups.
DKIM
Was the message altered in transit?
Your outbound server signs each message with a private key. The matching public key sits in DNS under a selector, and the signature survives forwarding.
DMARC
What should happen when those fail?
One record ties SPF and DKIM together and tells receivers to do nothing, quarantine, or reject. It also asks for daily reports on who is sending as you.