Before implementing a centralized naming scheme you must first
determine what address format you want to use.
First.Last@domain is becoming more and
more popular although there remains the issue of what to do when you
have two users named Mike Smith.c
Without a doubt, RFC 822 is the most heavily used addressing format in the world today. When choosing a format, make sure that it does not rub RFC 822 the wrong way: even if your organization does not use RFC 822 based messaging, much of the world does. A lot of people outside your organization may want or need to exchange mail with your users. Similarly, your users might find it desirable to have addresses which are easily gatewayed to or through the Internet. If this is not the case, then the likelihood that their addresses will be altered to the point of being unreplyable is increased. Watch out for characters called "specials" in RFC 822 as they will require quoting if they appear in the mailbox part of an address. The RFC 822 specials are
SPACE ( ) < > @ , ; : \ " . [ ]
c The popularity of