Can't telnet to port 25 on the host.


 
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Old 08-13-2010
Can't telnet to port 25 on the host.

Hi, we have recently setup a new UNIX server with solaris 10 and I am having issue with with SMTP/sendmail.

telnet localhost 25 --- works

telnet hostname.domain.com 25 -- does not work.
# telnet hostname.domain.com 25
Trying 10.122.1.111...
telnet: Unable to connect to remote host: Connection refused

I am a novice to sendmail but running a 'netstat -anf inet | grep 25' does not show port 25 listening on this host as it does on the other servers we have.

Your help needed... thanks!


Addition...

The ping command on the hostname works and below is the host file entry.
::1 localhost
127.0.0.1 localhost
10.122.1.111 hostname.domain.com hostname loghost
10.122.1.182 mailhost

Last edited by esmgr; 08-13-2010 at 03:26 PM.. Reason: Added information
 
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mconnect(1)							   User Commands						       mconnect(1)

NAME
mconnect - connect to SMTP mail server socket SYNOPSIS
mconnect [-p port] [-r] [hostname] DESCRIPTION
The mconnect utility opens a connection to the mail server on a given host, so that it can be tested independently of all other mail soft- ware. If no host is given, the connection is made to the local host. Servers expect to speak the Simple Mail Transfer Protocol (SMTP) on this connection. Exit by typing the quit command. Typing EOF sends an end of file to the server. An interrupt closes the connection immedi- ately and exits. OPTIONS
The following options are supported: -p port Specify the port number instead of the default SMTP port (number 25) as the next argument. -r "Raw" mode: disable the default line buffering and input handling. This produces an effect similar to telnet(1) to port number 25. OPERANDS
The following operand is supported: hostname The name of a given host. USAGE
The mconnect command is IPv6-enabled. See ip6(7P). FILES
/etc/mail/sendmail.hf help file for SMTP commands ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
telnet(1), sendmail(1M), attributes(5), ip6(7P) Postel, Jonathan B., RFC 821, Simple Mail Transfer Protocol, Information Sciences Institute, University of Southern California, August 1982. SunOS 5.10 9 Nov 1999 mconnect(1)