- Zimbra Collaboration 9.0.0 now available. Read the release notes.
- Zimbra Collaboration 8.8.15 LTS now available. Read the release notes.
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- Zimbra is Open Source! Read the FAQ. You can also contribute and build binary from source!
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- Fri Apr 26, 2019 8:12 pm
- Forum: Error Reports
- Topic: Webmail.unseen.is error 502
- Replies: 1
- Views: 2930
HTTP ERROR 502 Problem accessing ZCS upstream server. Cannot connect to the ZCS upstream server. Connection is refused. Possible reasons: upstream server is unreachable upstream server is currently being upgraded upstream server is down Please contact your ZCS administrator to fix the problem. Power...