We experienced a bounce from an email blacklisted by our ISP this morning. The listing of a signer whose email is blacklisted will go red and clearly alert you, clicking on the signers name will supply more info. Legalesign alerts you in the same way in the event of a normal bounce or an out-of-the-office message. Click on the signer name and you can clear the alert, then send a reminder email again to double check.
The Legalesign Blog - what we're up to and what's happening in e-Signature.