Sending external Email

[Thomas Maue]

Hello,
 
Ran into something I have never seen before and was wondering
if anyone could help.  Am working in a 4.5B environment.
 
Want to send a message from SAP to an external email address that
does not exist in SAP address management.  Have done this many
times before and not had a problem - with Workflow using SELFITEM
and programs using SO_ function modules.
 
Here, I am receiving a error and the message is not sent unless the
Recipient email address I use is contained in address management
(set up my own address already).  Works perfectly if I use an address
that is contained in address management but it has to be an exact
match (ex  thomas.b.maue at pmusa.com).
Note - The address maintenance of R/3 users is carried out either
the R/3 User Maintenance (Transaction SU01) or the Private
office settings (Transaction SO12).
 
Is there a Basis setting or a user exit that controls this cross-
reference to address management?  Have checked OSS but did not
find anything.
 
Thank you,
 
Thomas Maue
Workflow Consultant