| Event Id | 1722 |
| Source | SMTPSVC |
| Description | An unknown SMTP command occurred. |
| Event Information | "According to Microsoft: CAUSE : If the SMTP content application filter is installed, you must explicitly state which SMTP commands are permitted. Event 1722 occurs if you do not explicitly state the SMTP commands that are in use. RESOLUTION: To resolve this issue, add the appropriate SMTP command in the application filter. Or, you can disable SMTP content filtering if it is not necessary. " |
| Reference Links | Event ID 1722: An Unknown SMTP Command Occurred |
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