Difference between revisions of "DomainKeys Identified Mail"

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(New page: {{Expand}} '''DomainKeys Identified Mail''' ('''DKIM''') is a method for signing email messages to help eliminate spam. The signature in each message should give the domain (<tt>d=</tt>...)
 
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'''DomainKeys Identified Mail''' ('''DKIM''') is a method for signing email messages to help eliminate spam.  
 
'''DomainKeys Identified Mail''' ('''DKIM''') is a method for signing email messages to help eliminate spam.  
  
The signature in each message should give the domain (<tt>d=</tt>) and selector (<tt>s=</tt>). The appropriate key can be retrived as a TXT [[Domain Name System|DNS]] record from the host <tt>''selector''._domainkey.''domain''</tt>). A sample message from Gmail had the following DKIM header:
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The signature in each message should give the domain (<tt>d=</tt>) and selector (<tt>s=</tt>). The appropriate key can be retrived as a TXT [[Domain Name System|DNS]] record from the host <tt>''selector''._domainkey.''domain''</tt> [http://www.elandsys.com/resources/sendmail/dkim.html]. A sample message from Gmail had the following DKIM header:
  
 
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Revision as of 14:22, 29 April 2007

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DomainKeys Identified Mail (DKIM) is a method for signing email messages to help eliminate spam.

The signature in each message should give the domain (d=) and selector (s=). The appropriate key can be retrived as a TXT DNS record from the host selector._domainkey.domain [1]. A sample message from Gmail had the following DKIM header:

DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed;
        d=gmail.com; s=beta;

We can thus retrieve the Gmail key with:

$ host -t txt beta._domainkey.gmail.com
beta._domainkey.gmail.com descriptive text "t=y\; k=rsa\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC69TURXN3oNfz+G/m3g5rt4P6nsKmVgU1D6cw2X6BnxKJNlQKm10f8tMx6P6bN7juTR1BeD8ubaGqtzm2rWK4LiMJqhoQcwQziGbK1zp/MkdXZEWMCflLY6oUITrivK7JNOLXtZbdxJG2y/RAHGswKKyVhSP9niRsZF/IBr5p8uQIDAQAB"


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