「Pick a selector name... e.g. selector1 Put the public-key data in DNS, in your domain, using the selector name you picked. Take the contents of the public.key file and remove the PEM header and footer, and concatenate the lines of the file into one big line. Then create a TXT entry, like this:
selector1._domainkey IN TXT "k=rsa; t=s; p=MHwwDQYJK ... OprwIDAQAB"
where selector1 is the name of the selector chosen in the last step and the p= parameter contains the public-key as one long string of characters.」
