PhotoStore Documentation

Address in mailbox given does not comply with RFC 2822

This means and email address being used is not RFC compliant.

Chances are you forgot to enter an email in the contact info area of your manager.
Log into your manager and go to settings -> website settings -> contact info and enter in an email for both support and sales then save changes. That should correct the error.

Another possible issue is an invalid email used.
For example say someone signsup using joe@soap instead of
joe@soap is not a valid email address.