Hey all,

I have a problem with connecting to my smtp-server.


On my current system (Linux Mint 17) I cannot connect to my smtp server on port 25. But when I am using one of my older systems where Ubuntu 10.04 is running, everything works fine.
When I'm using a VPN connection to another network, it also works on Linux Mint.

So it isn't an issue with my thunderbird, but rather a network problem (?).

Do you know how can I test if there is an issue with opened/closed ports? Are there any differences in the network preferences between the old ubuntu and the new mint version?

Thanks in advance,
Jürgen

Telnet from the command line is a good tool.
Google "linux telnet smtp"

The errors generated will be somewhat informative.

Good Luck !

Thanks for your kind reply!

On Linux Mint, Telnet fails to connect to the smtp server - it times out.
When I'm using the VPN connection, it works. (As I said, sending Emails also works via VPN):
I guess it seems, that my network configurations blocks the connection to the smtp?!