Address in mailbox given does not comply with RFC 2822, 3.6.2.

Hi

I have an application that uses sc_mail_send to send emails based on an event
This works perfect well in my development environment (no errors reported) however when I deploy this into test i get the error Address in mailbox given does not comply with RFC 2822, 3.6.2.

Any ideas?

Think I’ve solved my own problem - In my test system one of the emails I was adding to the delimited list is null - it does not seem to like this