The web interface on https://spam.his.com went down at 10:45 PM EDT 4/14/2020 during a planned software upgrade.
We’re waiting for support from Barracuda. While we’re working on this issue, mail is flowing normally, but https://spam.his.com users can’t check their spam quarantines.
Update: 11:42 EDT 4/15/2020 – Barracuda was able to resolve the problem and the https://spam.his.com interface is back up and quarantines can be checked.