Winmail.dat received with a Lotus Notes Client

When an Exchange based email organization sends out an email to a non Exchange based organization (Lotus Notes or other systems for example web mailers) it could happen, that a non mapi client receives an empty email with a winmail.dat file attachment. The client is unable to open the winmail.dat file and so the email…


Messages sent from Exchange 2007 to Non-Exchange Recipients through an Exchange 2003 Connector are NDRed by the first Hub/Transport Server

In a mixed Exchange 2007/2003 environment with a Connector to a Non-Exchange System on an Exchange 2003 Server you cannot send messages from Exchange 2007 to a recipient in the Non-Exchange System if the following two conditions are true: 1) the Connector contains an Address Space with an underscore (“_”) in it, like in the following example:…