[Grml] Any mail client in grml allows me to relay mail through ISP

[T]

Hi

First of all, let me confess the hidden agenda for me to install grml --
to tap into the unbelievable knowledge base of grml users and admin, because 
I had been trying to setup my Postfix to relay my mails through my ISP with
SASL required many times but all failed.

I'm been searching and following the document on the net (eg, the following
two), but all attempts failed.

how to make postfix to use SMTP auth for sending mail to a smarthost
or a transport map relay server.
http://www.k2.on.lk/fourm/viewtopic.php?t=30

Gmail on Home Linux Box using Postfix 
http://souptonuts.sourceforge.net/postfix_tutorial.html

The reason that I need the mail relay is because my ISP has blocked my 25
mail port. So it is impossible for me to file bug reports, use my mail to
backup my save-config, etc ... Now that nearly 90% of people are suffering
from this mail port block, this feature would be requested again and again.

please help. thanks a lot