For email messages generated by the service (such as email notifications) werecommend whitelisting based on email addresses (In the mail headers From:,Sender:, or Envelope FROM).
Be aware that for robust email handling, the
specific email addresses change, however all of the email will originate from oneof the following domains safeschoolsalert.com, safecollegesalert.com,safepersonnelalert.com, or scenariolearning.com.
If you prefer to whitelist on the SMTP level, email will originate from SMTP
servers at customers.safeschoolsalsert.com.
Day-to-day business communication will come from the above listed domains,
but may originate from a dyna...
Allowed
Adobe Portable Document Format (.pdf) - application/pdf
... 
