User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) Build Identifier: version 2.0.0.23 (20090812) T.B show offline mail if i press cancel button several times without enter my password. so anyone can read my past mails by pressing cancel in master password dialog box. Reproducible: Always

The Master Password only protects the encrypted password store (and any mail certificates you use to sign and encrypt mail). Locally stored mail (or meta-information like subject lists) is not encrypted. If you need to protect your local data from other local users you need to use OS features designed for that, such as separate logins and/or use of a product that will provide an encrypted disk partition to store your mails on.