Hi,

We are running DKIM-milter 2.5.5 on our mail server, and
we have a TXT record in our "colby.edu" domain advertising
our public DKIM key, eg in bind:

ColbyApr2008._domainkey IN TXT ( "v=DKIM1; n=\"Colby College\"; "
        "g=*; k=rsa; t=s; "
        "p=[crypto string]" )

Our admissions people have contracted with a third-party email
outfit to do mailings to prospective students, and they want
us to stick their public key into our colby.edu domain, eg:

otherguysemail._domainkey IN TXT ( etc...)

I gather that the reason is so that when they send email to Yahoo or
whereever on our behalf (I guess probably forged as some colby.edu
address), then Yahoo will do a DNS lookup of 
otherguysemail._domainkey.colby.edu, get a correct response from
our DNS server, and then quickly take delivery of the email.
True?  Comments?  Brickbats?  Is this a bright idea to do? 
Since when did DNS become the keyring of the universe?

Jeff Earickson
Colby College

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