How to generate DKIM keys

Private key:

openssl genrsa -out private.key 1024

Public key:

openssl rsa -in private.key -out mail.key.pem -pubout -outform PEM

The first part of the filename mail.key.pem is the selector.

To get the text record, run this perl snippet:

perl -e '@l = <>; shift @l; pop @l; chomp @l; print qq(TXT record: "k=rsa; t=y; p=), join("", @l), qq("\n)' < mail.key.pem

Remove "t=y" when you are done testing.

Add the record to your DNS zone: IN TXT "..."

Add the record for ADSP: IN TXT "dkim=unknown"

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