I have before been able to send mail through Kmail at the university library. But now Kmail says that it can't establish contact with the mailserver (mail.riseup.net). At first I thought it was the university network that refused the contact. But maybe it's my computer? I have tried
telnet localhost 25
and get the answer:
telnet: connect to address 127.0.0.1: Connection refused
But, I don't know if telnet is the right command to use to test if the port is open at all. Any help will be appreciated!