Please enlighten me on when the most popular email client for worldwide corporate interests was “hacked into?” Outlook Express I might give you, but Outlook is the most used email client in the world. I’ve been a Microsoft engineer for over 15 years and don’t recall Outlook ever being implicated in a “hack.” It’s a mail client. Not much to hack.
I have had many clients over the years have their email accounts hacked into and sometimes hijacked. The most common denominator was usually Outlook Express, with Outlook a distant second. It became so bad that somewhere around 1999 I began actively recommending they remove the programs from their computers and use a professional service such as Fastmail instead.
Outlook, Outlook Express, and HotMail were not program-hacked, but their password data was compromised so badly that many people had their logins copied and lists of their login names and passwords were commonly available on the internet. You could go to various sources especially on Usenet and get such lists to log onto various sites or establish a presence or account on other websites.
Just FYI.