Cisco Bug: CSCvi81335 - Graymail Unsubscribe links results in 400 Bad Request when value prepended in "From" Header
Aug 09, 2018
- Cisco Email Security Appliance
Known Affected Releases
Symptom: Customer is observing 400 bad request when clicking Graymail Unsubscribe links. Refer enclosure for rewritten graymail unsubscribe URLs. Conditions: This occurs when three conditions are met: 1) The email must be triggering an incoming content filter having action as "Add/Edit Header" with rule as "edit-header-text("From", "(.*)", "\"[EXTERNAL]\"\\1")" The above rule means the customer is trying to prepend [EXTERNAL] to the value of "From" header where the word "[External]" is taken as example. 2) The email must have matched an incoming mail policy with Graymail Safe Unsubscribe Feature enabled. 3) The email must be having an "unsubscribe" link and gets rewritten by "Graymail Unsubscribe" feature.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases