DKIM Record Checker
DKIM signs outgoing emails. Receivers verify the signature using a public key in DNS.
DKIM lives on <selector>._domainkey.<domain>. If selector is empty, we try common ones.
Result for 2gsm.biz
Found
Selector: default
(TXT on default._domainkey.2gsm.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzlJDwpkIvTdwpuJDxcORpvJ8kv+qLkvOjRgiyJn5DkGaqrxZf5vG3ond2oLe1bis5/1r8fI6fwZOlt/l2uHHhXhL8KxGZnyu1Cwtj2Jsb3ozAbFW25BmKHYcWXxEnxfPcKkoR1Ohr3ADt8lrB+PtJMcQg71zqB2vTw3gFVG2QJI0oyZ1unG/i2XO6erodO8RwnPpFY2OIFcd46ycJ4EShvhz2rUoXFoL1qu/6RS0YALPE5wHPkWe1O4xZVk+4JTPmO6fW7HxgLWP8HnUn6g9SgWgmbYca7vmnR4ZzwA7aGAei4GnwA1edxXPln61nPzr8GSgaVvp62KfqRdMC5AXdwIDAQAB;
FAQ
Why does DKIM require a selector?
Selectors allow rotating keys and running multiple keys per domain.
Where is DKIM published?
TXT on <selector>._domainkey.<domain>.
DKIM record exists but emails still fail DKIM?
Signing may be disabled or the selector used in email differs from DNS.
Do I need DKIM if I have SPF?
Yes, many providers use both for best deliverability and DMARC alignment.
Can I have multiple DKIM selectors?
Yes, that is common for key rotation or multiple senders.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing emails. DNS stores a public key that allows receivers to verify authenticity.
Example
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0B...
Common mistakes
- Wrong selector (the record exists but under a different selector).
- Key is split incorrectly across multiple TXT chunks (some DNS UIs break it).
- Publishing DKIM but not enabling signing on the mail provider.