Sending Mails with Thunderbird or so from an another Network

[dmeinen]

Hello,

so i trying so much options to get acces into the SMTP Server from outside of the server. All in the localnetwork is working but not from outside.
So I need help. Because I prefeer it to work without an webmail service or so.

At my Computer with Thunderbird or Outlook and at the Phone with TypeMail.

I hat tried to connect over Telnet but it doesnt work from outside only inside

Sorry for my bad englisch if somebody speak german u can write with me on german

Greats 

Dennis