Yeah, like 15 years ago I was on a legal seminary about how to deal with private messages at work. It's difficult. If you allow your employees to use certain means of communication for private messages, you bar yourself from reading them. If you prohibit private messages on that channel though, you have to enforce that.
As an example you could give employees 2 accounts on the company's email servers: [email protected] and [email protected]. If now [email protected] sent to [email protected] "lets grab a beer after work. Also check this link below. I guess it fixes the problem we had all week with our servers", as an employer you would have to warn and ultimately fire him over such transgressions of the rule to split private from work. The problem is that you are not allowed to read his private correspondence (grepping the backup for business problems like "where was that link again?") but you are allowed to do all this with his business mail. Not enforcing a split leads to the company legally loosing all access to all the correspondence.
As an example you could give employees 2 accounts on the company's email servers: [email protected] and [email protected]. If now [email protected] sent to [email protected] "lets grab a beer after work. Also check this link below. I guess it fixes the problem we had all week with our servers", as an employer you would have to warn and ultimately fire him over such transgressions of the rule to split private from work. The problem is that you are not allowed to read his private correspondence (grepping the backup for business problems like "where was that link again?") but you are allowed to do all this with his business mail. Not enforcing a split leads to the company legally loosing all access to all the correspondence.