[ILUG] Problem with Postfix accounts

[Colin O'Keeffe]

Iam getting

maildir delivery failed: create
/home/mailer/Maildir/tmp/1114540061.P8821.inishmann: Permission denied

when i try to send emails? there returned to my inbox that is

have I to chmod the folders for all the accounts?

I have about 30 accounts, would it be worth my while setting up a
virtual mailbox , i rather not have 30 users on the linux box