Selectively signing outbound email

From: Sridhar Kakkillaya <>
Date: Thu, 11 Jul 2013 10:58:00 -0700

We are a relay service and send mails on behalf of various customers. We
have a situation where we have to selectively sign outbound emails. Is it
possible to sign messages only when the DKIM public key is found in the
original sender's DNS? Or are there any other workarounds to this?

Sridhar Kakkillaya
 <>Phone: 1.604.685.7488 x 509
Received on Thu Jul 11 2013 - 17:58:42 PST

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