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- HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other\SendTimeoutSeconds > DWORD Value = 00000600.
- HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other\ConnectTimeoutSeconds > DWORD Value = 00000030.
- HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other\ResolveTimeoutSeconds > DWORD Value = 00000030.
- Add the following keys to override the default timeout values: You can extend this period by modifying your Windows registry.
By default, the timeout is hard-coded to occur at 90 seconds. The message remains unsent in your Outbox. Click OK and continue through the rest of the dialogs.If you send a message with large attachments over a slow connection, the connection can time out.Verify that My outgoing server (SMTP) requires authentication checkbox is marked and that the Use same settings as my incoming mail server option is selected.The outgoing server can use 587 and TLS encryption.The incoming server must be set to 993, and it must use SSL encryption.