If I receive mail from an unknown sender, or one with no subject line, I always go to file/properties/message source" to read it. Am I right in thinking this is a safe way to read the mail? I've got NAV in place, updated continually, and have found this always picks up any nasties coming in, and use this really as a "belt and braces".
If i receive emails from unknown and with no title i think the safest way to deal with them is bin them,don't even bother reading the source,some bright spark of a virus programmer may have already thought about this and set the nasty to activate on people doing this,they may be scumbags but they arenot stupid.
Unfortunately, I do get genuine enquiries for my work, even from professional sources, who forget to add a subject line. Deleting them from the server or from my mail bag ignores the whole point of the enquiry.
As far as I am aware, there is no absolute guaranteed safe way to open an e-mail, once it is on your computer. If as suggested, you install Mailwasher, you can read it while it is still on the server, and only download it if you are happy. You CANNOT get a virus from reading it on the server. I believe that this DOES answer your question.