VERIFIED SOLUTION i

How to know if you need a new license for new releases of the MailStream Plus software

 Products affected:  MailStream Plus, All platforms
Does MailStream Plus (MSP) need a new license for new releases of the software?

No, MailStream Plus licenses are not particular to a version.  The same license file being used can continue to be used with new versions.
UPDATED:  April 14, 2017