[Preston] unlimiting 32 character username limit

[Garry Taylor]

> (1) Add an entry into /etc/mail/virtusertable:

>
reallyreallyreallyreallylongemailaddress at somewhere.com	username

> (2) Recompile the virtusertable:

> cd /etc/mail ; makemap hash virtuserable.db < virtusertable.txt

> (3) Restart sendmail:

> killall -HUP sendmail

> (4) Test

I new there was a reason I installed qmail :)

Giz