No JSC, It wasn't post-holiday sluggishness, it was NOMAD.
Issue Connecting to the Exchange Server
Monday, January 5, 2009, 8:50 a.m. Central The NOMAD/ODIN team is investigating a slow email connectivity issue for some users. Webmail is available as an alternative at https://webmail.nasa.gov/ for those with slow connections through their desktop or laptop mail client. An update will be posted in 30 minutes.
Monday, January 5, 2009, 5:10 p.m. Central The email connectivity issue experienced by users with mailboxes hosted at JSC has been resolved. The NOMAD and Microsoft teams are continuing to investigate the issue to determine the root cause.”