This article explains the procedure to fix if the recipient is unable to receive email for Security Director reports
A few probable causes for this issue are as follows:
1. Please make sure the recipient's email ID is correct
2. If the recipient looks fine, please check the SMTP server connection
3. The SMTP test connection should be successful and you should be able to receive the test email below
4. If the test connection fails, you will not get Security Director reports via email. Please ensure to recheck the SMTP server details