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Error message - The server has gone down...

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chris231
chris231
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Hello, Thanks in advance for looking! We have an issue with the error message: “The server has gone down etc…”

Each user has a personal email address which all work fine, however we also use a shared email account which when opening, will (intermittently) give the error message (The server has gone down etc...) and does not load the new emails in the folder.

What I’ve tried so far

  • TB Server Settings: Maximum number of server connections to cache - Reduced to 2
  • WHM Server: Maximum IMAP Connections Per IP Address - Increased to 20
  • WHM Server: Maximum Number of Authentication Processes - Increased to 50
  • Windows Security: Excluding TB in windows defender antivirus scans
  • Starting in TB safe mode.

Then I finally found that if I start in Windows 10 safe mode, it works!

Now I think I just need to work out what's running on the PC’s that's causing the issue. What's confusing is that the personal mailboxes work fine, which points towards the issue being due to mutable connections - however if it's working fine in safe mode, then it doesn't make sense to me…

Any help would be greatly appreciated.

Thanks Chris.

Hello, Thanks in advance for looking! We have an issue with the error message: “The server has gone down etc…” Each user has a personal email address which all work fine, however we also use a shared email account which when opening, will (intermittently) give the error message (The server has gone down etc...) and does not load the new emails in the folder. What I’ve tried so far * TB Server Settings: Maximum number of server connections to cache - Reduced to 2 * WHM Server: Maximum IMAP Connections Per IP Address - Increased to 20 * WHM Server: Maximum Number of Authentication Processes - Increased to 50 * Windows Security: Excluding TB in windows defender antivirus scans * Starting in TB safe mode. Then I finally found that if I start in Windows 10 safe mode, it works! Now I think I just need to work out what's running on the PC’s that's causing the issue. What's confusing is that the personal mailboxes work fine, which points towards the issue being due to mutable connections - however if it's working fine in safe mode, then it doesn't make sense to me… Any help would be greatly appreciated. Thanks Chris.

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Matt
Matt
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I would suspect some form of connection scanning. probably an anti virus or an edge device the connection goes through. What changed on the network hardware wise about the time the issue arose? If nothing I would be more convinced to look at security software. Anti virus is usually the least tested, and least controls software on a business network, it update in some cases multiple time an hour without and local supervision.