crontab mail

[Leslie Jensen]

If I specify
MAILTO="email@my.domain"

in roots crontab.
I'll recieve mail when cron runs what I've asked it to.

With
MAILTO="root"

Mails are delivered to the local mailbox on the system


In /etc/postfix/aliases I have
root:           email@my.domain

I've executed newaliases at the command prompt.


Has anyone got an idea on why I can't get the mails to root to my 
external mail address?

Thanks

/Leslie