Secure Email Relay (SER) is a hosted SMTP relay that secures application transactional email using your company's domains. Internal or 3rd party applications connect to SER in a secure manner and all email is DKIM-signed and scanned with Proofpoint anti-spam/anti-virus technology prior to being distributed to the Internet. The Proofpoint SER Splunk Add-on integrates with the SER API to collect data that populates in the Proofpoint SER Splunk App.