The mailserver I am sending the message from is at home, where I am sending to is Hosted in Amsterdam. I think that you are right about my ISP blocking port 25, how to change that port to another, and also make ISPC check (for checking if the service is up) the other port, not 25?
I have not yet forwarded any ports in my router, but I don't think thath that would solve the problem because thath would only allow me to receive mail from external networks, which isnt needed as of yet, it would also allow me to send mail from an external network to this mailserver which is also not needed as of yet. Sending mails from this mailserver can be done without forwarding any port, right? Sending emails internal works great (sending and receiving)!
Last edited by GHz; 15th July 2009 at 16:44.