"Evans, Richard K. (GRC-H000)" richard.k.evans@nasa.gov writes:
That said, I would like to send out an email to ALL my users informing them of outages, etc.. What is currently the best approach to doing so?
We've used a prominently displayed sitenotice for this. This has the advantage of notifying those who use the wiki regularly.
https://www.mediawiki.org/wiki/Manual:Interface/Sitenotice
Mark.