Re: TELNET Connection To Open Port Times Out



On 24 Nov 2006, in the Usenet newsgroup comp.os.linux.networking, in article
<1164389270.036363.317720@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
PowerLifter1450@xxxxxxxxx wrote:

I've been trying to tweak sendmail on my Fedora Core 2 server so that
I can receive mail sent from the Internet to my local mail account of
the server.

Fedora Core 2 is quite obsolete, being unsupported at fedoralegacy.org
since July. Do you have a published MX record, or domain pointing at
your router?

I have the Submission service running on Port 587 and I forward the port
to the server from the router.

Most mail servers expect to find the mail server on port 25.

When trying to Telnet to the Port using the local IP address (192.168.1.100
587) it works fine, but when trying to use the public IP address, it
always says the connect times out. A port scan reveals that the port is
indeed open

Use tcpdump, and see what the packets are saying.

I suspect this is why I am not able to receive mail.

Receive mail from who? You normally receive mail via your ISP, who is
probably allowing you to get the mail from their server using POP3 or IMAP
(a program like fetchmail). If you have your own domain registered, the
Internet expects to find your mail server listening on port 25.

Any ideas why the Telnet attempt will not connect?

netstat -tupan Is it listening on the eth0 interface? (Look at the
Local and Foreign addresses)

Old guy
.



Relevant Pages

  • Re: Unable to connect to SMTP over internet
    ... >POP3 clients are able to connect from the internet and get ... >assume means that communication over port 25 is working). ... >the mail server cannot be contacted on port 25. ... >users from within my network are able to send emails using ...
    (microsoft.public.exchange2000.admin)
  • Re: Activating Port 587 for relaying SMTP?
    ... > sending mail to any other mail server on the internet. ... Some of my clients, who use this machine as a mail relay and mailbox server, ... There are other providers as well, who block port 25 outbound, who I have ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: Mail Server Query
    ... This is on port 25. ... external mail server to the internal mail server. ... the internet, then you don't need to do anything special. ... To forward all mail to the external mail server, ...
    (Ubuntu)
  • Re: E-Mail Highjack???
    ... not hosting my own mail server on the internal network. ... The network was set up simply for internet cable access ... what's using port 25. ...
    (microsoft.public.security)
  • Re: Which email wizard should I use - CEICW or IMW?
    ... Looks like this is due to a missing mx record on my isp, ... > myname@xxxxxxxxx mail server be rejecting mail because of that? ... >> blocking the port. ... It also receives emails from the internet. ...
    (microsoft.public.exchange.admin)