Error 1: While running Exchange Best Practice tool
The version of TCPIP.SYS installed on server abs.londonsys.local may cause connectivity issue in some networking configuration. if you are experiencing issues with this server. Please review the recommendation in microsoft knowledge base.
Error2: when i looked at event viewer under application log.
This is an SMTP protocal error log for virtual ID 1, connection # 821. The remote host “188.8.131.52” responded to the SMTP commamnd “RCPT” with 550 requested action not taken. Mailbox unavailable. the full command sent has RCPT TO <[email protected]>”. This will probably cause the connection to fail.