Internet Link Network Structure  

If you use a network structure for which several R/3 Systems should be linked to the Internet, a SAP Internet Mail Gateway must be installed for every R/3 System. The following possibilities exist for message transfer between R/3 Systems and the Internet:

In a central structure, none of the names of the computer which receives the Internet messages may be identical to the system name of an R/3 System which is operated by the gateway. Otherwise, messages cannot be easily forwarded to R/3 systems.