Cisco Bug: CSCzv45099 - System doesn't try the IPv4 directions if all IPv6 destinations perm...
Sep 25, 2018
- Cisco Email Security Appliance
Known Affected Releases
Symptom: When encountering a ServFail reply looking up a AAAA dns record the IronPort will be unable to deliver to a host, if configured for IPv6 Preferred delivery. Mail will queue and not try the A record for delivery. Conditions: AAAA record must return a ServFail
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