The following email validation criteria are applied when an offer is saved:
•Sender's email address is invalid
•Email subject is missing
•No email text content has been provided
•No email HTML content has been provided
•Parameter parentheses contain an invalid parameter
•Parentheses should contain an integer followed by:
•Parameter does not match embedded content
•Content contains open parameter brackets e.g.
•Parameter brackets do not contain a parameter id and name