Brightmail with Multiple Certificates

Hi,

We have a messaging gateway 10.0.1 and require a TLS certificate to communicate to some of our customers. Currently we have a self signed cert. A new customer requires that we have a cert issued by a public CA.

My question is:

Will adding this extra cert break anything with any of our other customers currently using our self signed cert and can we have a self signed cert and public cert coexist?

Thanks,

Crazy Tech