Digital Guardian - Exfiltration to private email

Original query, unchanged.

DigitalGuardianDLPEvent
| where NetworkApplicationProtocol =~ 'SMTP'
| where isnotempty(inspected_document)
| extend s_user = substring(SrcUserName, 0, indexof(SrcUserName, '@'))
| extend d_user = substring(DstUserName, 0, indexof(DstUserName, '@'))
| extend s_domain = extract(@'@(.*)', 1, SrcUserName)
| extend d_domain = extract(@'@(.*)', 1, DstUserName)
| where s_domain != d_domain
| where s_user == d_user
| extend AccountCustomEntity = SrcUserName