Agree with Shipwreck.
Our corp welcome mail specifies that you should check corp bulletins when you join.
All “quick”’ corp info is on the chat MotD.
All other important info for the corp? Discord, special announcement channel with corp announcements etc.
As a recruiter, I try to recheck the corp bulletins once a month, just to verify that what is stated there is still actual. If stuff needs to be changed, likely it already is known to existing corp members through the MotD, Corp mail or Discord post. It just needs to be updated for the new recruits to be the actual new information.