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Cisco Bug: CSCvt34707 - Incoming / Outgoing Mail Policy configuration restricts certain characters

Last Modified

Jun 02, 2020

Products (1)

  • Cisco Email Security Appliance

Known Affected Releases

12.5.2-006 12.5.2-007 12.5.2-008

Description (partial)

According to RFC, in AsyncOS 12.0 or later, addresses containing underscores can no longer be registered in policies. Policies will display error when trying to add such an address in ESA GUI screen -> Mail policy -> Users.

But with the SMTP command MAIL FROM, ESA returns OK and accepts the address even if the address contains underscore.

ESA running affected AsyncOS versions
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