LinuxQuestions.org
Download your favorite Linux distribution at LQ ISO.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 07-16-2014, 08:13 PM   #1
juergend
LQ Newbie
 
Registered: Jul 2014
Posts: 2

Rep: Reputation: Disabled
Connecting to SMTP server on Port 25


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
 
Old 07-17-2014, 12:24 AM   #2
ceyx
Member
 
Registered: May 2009
Location: Fort Langley BC
Distribution: Kubuntu,Free BSD,OSX,Windows
Posts: 342

Rep: Reputation: 58
Quote:
Do you know how can I test if there is an issue with opened/closed ports?
Telnet from the command line is a good tool.
Google "linux telnet smtp"

The errors generated will be somewhat informative.

Good Luck !
 
Old 07-17-2014, 03:42 AM   #3
juergend
LQ Newbie
 
Registered: Jul 2014
Posts: 2

Original Poster
Rep: Reputation: Disabled
Thanks for your kind reply!

On Linux Mint, Telnet fails to connect to the smtp server - it times out.
Quote:
telnet <ServerName> 25
Trying <ServerIP>...
telnet: Unable to connect to remote host: Connection timed out
When I'm using the VPN connection, it works. (As I said, sending Emails also works via VPN):
Quote:
telnet <ServerName> 25
Trying <ServerIP>...
Connected to <ServerName>
Escape character is '^]'.
220 **************************
I guess it seems, that my network configurations blocks the connection to the smtp?!

Last edited by juergend; 07-17-2014 at 03:44 AM.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem Connecting to IMAP and SMTP server through iptables firewall kaplan71 Linux - Server 3 01-31-2008 09:30 AM
new port number for the SMTP server aimstr8 Linux - Server 2 07-07-2007 12:26 AM
PHP mail not connecting to SMTP server but can connect with telnet mrJimmbo Linux - Server 1 12-12-2006 06:51 PM
Postfix Mailserver connecting to ISPs SMTP-server via Proxy/Router saavik Linux - Networking 2 07-17-2006 02:05 AM
smtp server can't get port 25 Charles Daniel Linux - Security 1 10-26-2004 08:27 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 10:05 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration