The hardware problems that disrupted e-mail service last week reappeared yesterday afternoon, interrupting service intermittently over a period of several hours. Service personnel investigating the problem now suspect it might be caused by software and have provided a modification for us to install. The modification will help to avoid the problem and will gather more information to identify the cause. We will continue to monitor the system and will attempt to restore service as quickly as possible if the problem arises again. In order to install the software modification, we will be interrupting the e-mail and phoenix servers for about 15 minutes beginning at 4:30 this afternoon. We regret the inconvience and disruption of service.