vojtech, thank you, but this value could be tweaked? I mean, this information is stored at HKEY_CURRENT_USER\Identities{…key…}\Software\Microsoft\Internet Account Manager\Accounts<number of the account>\POP3 Timeout.
Do you know a tweaker to reach it?
Is there any trouble to set it to more than 5 minutes (300 seconds)?
If this value is different from the avast! setting, which will prevail?
Thanks 