i receive multiple copies of all the messages from my inbox
e-mail SP: exmail.qq.com each time I check my mail with thunderbird (POP3) all the mails in the server inbox are downloaded again. I have tried all the suggestionn from the form (deleting the index, deleting the date file, un-checking leav on server box). my colleagues who use outlook have a checkbox to solve the problem ("do not download multuple copies of one mail). I don't see the equivalent in TB.
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Chosen solution
Your 'popstate.dat' file keeps a record of what it has downloaded, so that when it connects with the server and looks in the server Inbox, it should not download anything that was previously downloaded.
In your case, you have kept old previously downloaded mail in the server Inbox and the confused popstate.dat is seeing them as needing to be downloaded.
This means that the 'popstate,dat' file must be corrupted - gone awol - because it keeps downloading previously downloaded emails.
You need to access your Profile Folders and delete the 'popstate.dat' file.
Profile Folders are hidden folders.
make hidden files and folders visible:
access Profile Folder:
In thunderbird:
Help > Troubleshooting Information click on 'Show Folder' a new window opens showing your Profile Folder. Close Thunderbird now - this is important
Click on 'Mail' folder click on 'mail account name' look for 'popstate.dat' file and delete it.
close the window.
Open Thunderbird.
What will this do?
When Thunderbird restarts, it will create a new 'popstate.dat' file. The downside is this. As it has no knowledge of what has been downloaded, it will download everything that is on the server Inbox, but only once.
The good thing is this. This should fix the popstate.dat file and prevent further downloads of previously downloaded mail.
You will then need to delete any duplicates that were previously downloaded. There is an addon that you could use to help with duplicates.
see image for where popstate.dat file is located.
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Chosen Solution
Your 'popstate.dat' file keeps a record of what it has downloaded, so that when it connects with the server and looks in the server Inbox, it should not download anything that was previously downloaded.
In your case, you have kept old previously downloaded mail in the server Inbox and the confused popstate.dat is seeing them as needing to be downloaded.
This means that the 'popstate,dat' file must be corrupted - gone awol - because it keeps downloading previously downloaded emails.
You need to access your Profile Folders and delete the 'popstate.dat' file.
Profile Folders are hidden folders.
make hidden files and folders visible:
access Profile Folder:
In thunderbird:
Help > Troubleshooting Information click on 'Show Folder' a new window opens showing your Profile Folder. Close Thunderbird now - this is important
Click on 'Mail' folder click on 'mail account name' look for 'popstate.dat' file and delete it.
close the window.
Open Thunderbird.
What will this do?
When Thunderbird restarts, it will create a new 'popstate.dat' file. The downside is this. As it has no knowledge of what has been downloaded, it will download everything that is on the server Inbox, but only once.
The good thing is this. This should fix the popstate.dat file and prevent further downloads of previously downloaded mail.
You will then need to delete any duplicates that were previously downloaded. There is an addon that you could use to help with duplicates.
see image for where popstate.dat file is located.
