At 4:59:59 PM on Thursday April 5 2018 the wildcard certificate for cosine.oregonstate.edu expired.  This has affected access to Cosine Webmail and IMAP services.  We are actively working to fix the issue.  An update to this announcement will be posted once service is restored.

UPDATE:

Cosine Webmail and IMAP services have been restored at ~ 7 PM.  Please close and re-open your email application or browser if you still cannot login.