Hello to you all, I have got a problem recieving and sending mails. I did search howtoforge and other sites for a solution, and tried to solve my problem. My ISP is blocking port 25. So I uncomment submission, put port 587 into my router pointing to my server, put TCP 587 into the firewall of ISPConfig 3 restarted the server as proposed in multiple threads. But without succes. Doing a portscan port 587 is open, 25 is closed. Telnetting to the port functions, but I am unable to sent and recieve mails. In the mail error log there is the remark: No route to host (port 25). Are there other settings I have to change? With kind regards, Ad.