[cobalt-users] Extra Raq or what?

["Zarrir Junior" <zarrir@xxxxxxxxxxxx>]

Has someone found a reasonable way around the following situation: 2000
users to be distributed among 150 virtual sites, each of these virtual sites
are vanity email domains which have surnames after @ like:
   user1@xxxxxxxxxx   user2@xxxxxxxxxx  user3@xxxxxxxx
    It happens that all of them want a short first name as john, david, dan
;-) but of course there are at least 20 john among the 2000. The webmail
program is not hackable for them to authenticate exclusively via email
address. There has to be a login name but i would prefer not to let them
notice they are john155 or john1023. Also, the Webmail program  (although it
is possible to configure a "reply to" address of john@xxxxxxxxxx for
everybody) would always "confess" to the recipient that the email was from
john155@xxxxxxxxxxx If someone has an easy way around this mess, then
prepare to fase 2: What if in some of the cases there are more than two john
with surname crosby, for instance? Should i seriously consider two or more
dedicated servers?
        Thanks for any light
              Zarrir