Exchange MTA Errors after decommisioning Server

One of our clients asked us to remove an old server reference (COMMSERVER) from System Manager, this server was an Exchange 5.5 box.  I used ADSI edit to remove the reference from the Configuration\Services\Microsoft Exchange\CN=Wilberforce Chambers\Administrative Groups\CN=New Square\Servers\  container.  however this has caused the following errors to be logged which are filling the event logs up.  

Event Type:      Warning
Event Source:      MSExchangeMTA
Event Category:      X.400 Service
Event ID:      290
Date:            02/03/2007
Time:            10:22:49
User:            N/A
Computer:      MAILSERVER
Description:
A non-delivery report (reason code transfer-failure and diagnostic code MTS-congestion) is being generated for message C=GB;A= ;P=Wilberforce Cham;L=MAILSERVER-070116180031Z-2331. It was originally destined for DN:CN=MICROSOFT PUBLIC MDB,CN=COMMSERVER,CN=SERVERS,CN=CONFIGURATION,OU=NEW SQUARE,O=WILBERFORCE CHAMBERS§ (recipient number 1), and was to be redirected to DN:CN=MICROSOFT PUBLIC MDB,CN=COMMSERVER,CN=SERVERS,CN=CONFIGURATION,OU=NEW SQUARE,O=WILBERFORCE CHAMBERS§C=US;A= ;P=Wilberforce Cham;O=New Square;S=COMMSERVER-Pub IS;. [MTA DISP:RESULT 16 136] (12)

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Event Type:      Warning
Event Source:      MSExchangeIS Public Store
Event Category:      General
Event ID:      1025
Date:            02/03/2007
Time:            10:22:48
User:            N/A
Computer:      MAILSERVER
Description:
An error occurred on database "First Storage Group\Public Folder Store (MAILSERVER)".
 Function name or description of problem: Replication Msg Was Non Delivered. Logging and deleting it!!
Error: 0x80004005

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