> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/analytics-alerts/alerts-by-name/sensitive-exchange-mail-sent-to-external-users.md).
# Sensitive Exchange mail sent to external users
### Synopsis
| Field | Value |
| -------------------- | ------------------------------------------------------------------------ |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | 1 Hour |
| Deduplication Period | 1 Day |
| Required Data | Office 365 Audit |
| Detection Modules | Identity Threat Module, Email |
| Detector Tags | O365 DLP Analytics |
| ATT\&CK Tactic | Collection (TA0009), Exfiltration (TA0010) |
| ATT\&CK Technique | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity | Informational |
### Description
A user sent sensitive email messages to external users.
### Attacker's Goals
An attacker is attempting to collect sensitive email information.
### Investigative actions
* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.
### Variations
Exchange mail to external account matching high severity DLP rules
**Synopsis**
| Field | Value |
| ----------------- | ------------------------------------------------------------------------ |
| ATT\&CK Tactic | Collection (TA0009), Exfiltration (TA0010) |
| ATT\&CK Technique | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity | Low |
**Description**
A user sent sensitive email messages to external users.
**Attacker's Goals**
An attacker is attempting to collect sensitive email information.
**Investigative actions**
* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.
Sensitive Exchange mail sent to an external user
**Synopsis**
| Field | Value |
| ----------------- | ------------------------------------------------------------------------ |
| ATT\&CK Tactic | Collection (TA0009), Exfiltration (TA0010) |
| ATT\&CK Technique | Email Collection (T1114), Exfiltration Over Alternative Protocol (T1048) |
| Severity | Low |
**Description**
A user sent sensitive email messages to external users.
**Attacker's Goals**
An attacker is attempting to collect sensitive email information.
**Investigative actions**
* Look for signs that the user account and mailboxes are compromised (e.g. abnormal logins, unusual activity).
* Follow further actions done by the account.
* Look for unusual email patterns from the affected mailbox (e.g. unusual email contents).
* Examine the user's email activity history for suspicious behavior.
---
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