My wife and I both have Tiscali as our email provider though we both use Entanet for BB. I can go onto my email at the Tiscali web site and block senders from there which saves me having to download lots of trash. If my wife tries to block senders in the same way she gets an IE message along the lines of the following "failed to add sender to your list of blocked senders. Please check your primary email account settings". Anyone out there know why, please.
Just been looking at your problem again,And it says check e-mail account setting,So I may have got it wrong,But here goes just in case,Control Panel,User accounts,Click on your account,Change my account type,And dot the Computer administrator.Long time since I have done it but I think that is just about it.
click here You can try this till you get your e-mail sorted out,This will take up to 8 e-mail accounts,Any e-mails you dont want you can just delete them on this without opening them,I use it any spam or any e-mails I get from someone I dont know,I just delete them.Any you want to keep will get transferred to your own account when you open it.Worth a try.