The link to your release can be sent to your contacts for as long as they are selected as a recipient. If they are not selected as a recipient, then they will get an error if they try to access the link.

The link to a Play MPE release is in this format - https://player.plaympe.com/releases/releaseInfo/XXXXXXXXX
The XXXXXXXXX is the ID of the the release. If the ID of your release is 999999999, then the release link is going to be https://player.plaympe.com/releases/releaseInfo/999999999

Please note that the release has to be published for the link to the work. If you send a link to a release that is not published, the release will not be accessible.