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 asahi.com
Found
Selector: selector1
(TXT on selector1._domainkey.asahi.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCpEeJaRC8TFtvsBE9NwM8GOFvIY+JmZ6o9NeLEfly4NvcQhizeBw9ZJvcIHPQS6N8KqrLyJc+B9QXqHhmb3FPr8GO8My1SdxwYe2DtwYoQvX0Bl1J8l5lTvr3uooZa0+trZaxwkjZXZRJDd4jexWcbnES6fqFkvdfewnh4a+huHwIDAQAB;
Selector: selector2
(TXT on selector2._domainkey.asahi.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoDfL8zHdtwOiJ8793ElxdSUpKs8LZKcibCfKoeU8DCKeqsGNeMu+1yymWDcdNMUG8/c2S6tBa3Au0s2yALBwzPI/lF83cCOGoQZnasQPMshwhuxHPxKDurUNrYMJl7hQVFxeLCu1gruftMkwXCoXILyigxtF78U7MNKjLU5hjFVHbYUAREA2dYRNB+uQyoafCazQH02Yc85ymVndDJHXTEgDt9CoMonjs0qI4a4peK0Sj9zyN29w09kxHzmlmv5bNpikh205tVKtxgdTH/wIMMw07uR48eYGGFBNeHPuGv594dywDz2LhBX8Hcy+hgZVhzhJF7mgkFQYLqHsNrCxGQIDAQAB;
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.