In your REport, are you using the send mthod -'email' or '-smtp' (Simple Mail Transport Protocol)
Using '-email' requires a MAPI login, while '-smtp' does not. We have found a lot of problems with e-mail reporting can be resolved by using '-smtp'. You would still continue to use an e-mail address when using thsi option, for example
From the Command Line Interpreted Guide (CLI)
The recommended option for sending reports by e-mail. Sends the report to the specified
EmailAddress using the SMTP protocol
By default, the SMTP server address is set to the Cell Manager address. To change the SMTP
server, edit the variable SMTPServer in the global options file. The server must be accessible
from the Cell Manager system, but does not need to be part of the Data Protector cell.
In the 'global' file
# default: <cell manager host>
# SMTP server for sending emails.
Let me know if you are not familiar with editing the 'global' file