The UPS email server appears to have lost all incoming email to anyone at ups.edu from last night June 4th to this morning June 5th. Outside email appears to be working again at around 9:00 am PDT.
If you sent us something, assume it was lost. Your mail server mail retry to send since the outage seems to have been less than 24 hours, and good mail servers will usually retry undeliverable email again for up to 24 hours.
