hy pls help me with my mail server ... i mean .. my isp has bloked all the ports and i`m havin` trouble recevin e-mails i need a solution that doesent cost me can u help me ? 10x

Surely this is a problem with your isp - there is nothing you can change in slack to fix it.

You need to give us a little bit more information !

If your ISP is blocking all the ports, then you can't internet at all.

So, i presume, you mean with all the ports, that is port 25.

You have an incoming port 25 and an outgoing port 25.

With the outgoing port, you send email,
with the incoming port, you receive email.

My ISP is blocking incoming port 25, but not outgoing port 25.

So, with my MTA (Postfix) I can send directly email,
but i cannot receive email at port 25.

For that you need a commercial service that can
forward port 25 to, for example, port 2525.

Look at http://www.dyndns.org/services/mailhop/
for more info
(mail relay - for blocked incoming port 25)
(mail outbound - for blocked outcoming port 25)