Error "An item with the same key has already been added."

1

I have attempted to uninstall and reinstall eMail Client to resolve the subject issue, to no avail. The program will not retrieve or send mail.  Here is a copy of the log after uninstall and reinstalling:

6:39:18 AM Online state: changed to online due to NetworkAvailability 
6:39:18 AM Tx.rr (mark.williams9) [POP3]  Connecting: To Tx.rr (mark.williams9)
6:39:18 AM Tx.rr (mark.williams9) [POP3]  Connected: To Tx.rr (mark.williams9)
6:39:19 AM   System.ArgumentException: An item with the same key has already been added.
6:39:19 AM    at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
6:39:19 AM    at System.Collections.Generic.Dictionary2.Insert(TKey key, TValue value, Boolean add) 6:39:19 AM    at MailClient.Protocols.Pop3.Pop3Account.CheckUids(IEnumerable1 uidsList)
6:39:19 AM    at MailClient.Protocols.Pop3.Pop3ReceiveCommand.Execute(WorkerStatus status)
6:39:19 AM    at MailClient.Commands.Command.Process(WorkerStatus status)

Searching this forum I see that it is an ongoing problem with no apparent resolution. At the moment I will need to uninstall the program and use my old e-mail app.

Mark

2

Uninstalling the application will not make any difference. Rather, try deleting the database and then start again.

To delete the database, close eM Client, and then delete or rename C:\Users_[username]_\AppData\Roaming\eM Client. You may have to show hidden items in Explorer to do that.

You will want to make a backup before you delete the database, just in case you lose anything. You can do that in Menu > File > Backup.

After you delete the database and restart eM Client, setup the POP3 account, then check you have the correct POP3 settings in Menu > Tools > Accounts. The port should be 995 with the security policy set to Use SSL/TLS on special port (legacy).