Yes it has these kind of mechanisms are embedded: If there is an error in the middle of a syncing then Gmvault will wait few seconds and try to restart the cur

Yes it has these kind of mechanisms are embedded: If there is an error in the middle of a syncing then Gmvault will wait few seconds and try to restart the current operation. After 4 attempts it will leave in error. Gmail imap servers can start to throttle the transfer and also cut the connection. Gmvault also has a restart mode (option --restart) to restart where it was. Actually up to 20 emails before because Gmvault save its "position" (email id synced or restored sucessfully) regularly.