[Exim] sender_reject Question

    I have 2 questions:

    1) When using the sender_reject option e.g.

        sender_reject= spammer@???:spam.com

    I would like to add another entry such as 
spammer1@??? what would be the delimiter for the above, 
is it a comma, colon or whitespace.

    2) Since I have no real experience with a dbm style file how 
would one generate such a file for use with the above option. RTFM 
directives are most welcome provided you tell me what part of the 
manual. I am using Redhat 7.0 and also a test Solaris 8 box.

    Cheers and thanks for the help.

    Aly.