Do you mean work-related online abuse or during personal use?

Work related

One thing I have tried (unsuccessfully) to get IT to change email protocols. They seem to insist firstnamedotlastnameatcompanydotcodotnz is a good idea.

Except it is giving out personal details and makes it easier for abuse, scammers and doxing

Thanks. We have been having success with redirecting any emails that come in from regular abusers to an abusemonitoring email address.

What about looking at the root cause of the abuse? Just saying that when I have investigated any abuse at work via any medium I have found that there was a catalyst and once dealt with it resolved itself. Also I encourage my staff to be wary about who they give their work email to.