[exim] cancel full email name

Hi good guys over here ,



I think this may be the easiest question you will hear on this strong list
:-)

When my users authenticate to the mail server , they have to write their
full email in outlook express for example,

When they only write the username , it doesn't work , and authentication
fails.



How could I let them write only the username in the field user, instead of
writing user@??? ??



What should I change in the configuration file of exim





Thanks a lot



Naguib