Resolved: WebMail Service Degradation
This issue was caused by an Operating System (OS) patch applied this morning. To remediate, the OS was reverted back to the previous state and WebMail returned to normal functionality at 9:16am. No email messages were lost and any queued messages were processed.
More information: Resolved: WebMail Service Degradation
Story added 2. March 2015, content source with full text you can find at link above.