It sounds like an error occurred while the application made a MapiResolveName MAPI_E_FAILURE is a catchall error code meaning one or more errors returned, which not very usefull.
MAPI is a standard Windows interface that allows WinZip and other programs to instruct your email program to create a new message and attach a file to it. Generally, you would only need to have your email program set as the default and have an email account configured, to have simple MAPI working.