[ANNOUNCE] Minor email maintenance, 7:00 pm tonight (Tuesday June 7)

There will be minor maintenance on the email server tonight (Tuesday, June 7) at 7:00pm, as a preparation step for the migration to Office365 later this summer.
This announcement is to alert users to the possibility of slow email response between 7 and 8:00 pm, though it is expected that there will be no slowdowns or user-visible effects.