But i'm confused why google said it's a permanent failure.

It was strange. I received the email below in my gmail account and 10 minutes later the email server was working. I was happily spamming all my friends and family

Thaks for your help.

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 5.7.1 <www@lucanuscervus.co.uk>: Relay access denied (state 14).

telnet mail.mydomain.co.uk 25

check whether working?

A record points to my home server. I have a dynamic ip and the server use the ddclient (zoneedit) to update this information
Regarding the MX record mail.my-domain.co.uk points to mydomain.co.uk

I've checked also my router and ports are correctly forwarded.

Also, thanks for your reply

I've just installed iRedMail in an Ubuntu 8.04 virtual machine running in virtualbox. Everything seems to be ok apart of the fact that I cannot receive email from outside, gmail, yahoo....
I managed to email my gmail account and also I'm able to access the email client form outside.

Any idea where I should start looking for the problem?

thanks in advance

PS

Thanks for the script. It's amazing