sendmail connection timeout Post: 302478994

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Special Forums UNIX and Linux Applications sendmail connection timeout Post 302478994 by rbatte1 on Thursday 9th of December 2010 10:39:28 AM

12-09-2010

Moderator

You seem to be trying to route this through the local host, 127.0.0.1 and so you may need to adjust the sendmail.cf file, usually found under /etc somewhere (use find /etc -name sendmail.cf)

Within this file, find and uncomment the DS statement. It sould have the format:

Code:

#
#
DSmymail.router.company
#
#

This would need to be your local mail server and that would need to have whatever routing rules to allow you to send through it. Often these are open, but many companies shut them down to avoid sending vast amounts of spam if a desktop is compromised by a virus.

Best to use a DNS name that resolves the IP address. You may need to stop/start the sendmail service to activate the update.

You also need to check that there are no blocks on your path the the mail server. Try a

Code:

telnet mymail.router.company 25

You should get output like:

Quote:

Trying...
Connected to mymail.router.company.
Escape character is '^]'.
220-SMTP Relay
220 Warning: no name found in DNS for your host address
quit
221 mymail.router.company closing
Connection closed.

If you don't then a long delay suggests wrong IP address, firewall block or wrong routing information in the network. A fast rejection may suggest that this is not the mail server.

I hope that this helps.

Robin
liverpool/Blackburn
UK

Last edited by rbatte1; 12-09-2010 at 11:46 AM.. Reason: Spelling

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local.users

local.users(4)						     Kernel Interfaces Manual						    local.users(4)

NAME

       local.users - Specifies mail recipients on the local host.

DESCRIPTION

       The  local.users  file  contains  a  list  of  user names whose mail is to be delivered to the local host and whose return address is user-
       name@hostname.  Entries in the local.hosts file are in addition to other local users (such as root and postmaster). See sendmail.cf(4)  for
       a description of other local users.

       You  can  add  entries  to this file if the host is configured as a simple client and either of the following is true: The user wants their
       mail delivered on this machine rather than being forwarded to the mail server.  You are adding  aliases	to  the  /var/adm/sendmail/aliases
       file. When the host is configured as a simple client, the alias must be added to this file and the aliases file.

       A simple client is defined as a host that had the mail system configured using the MailConfig application from the System Management utili-
       ties or configured using the mailsetup utility's Quick Setup menu.

       The format of the file is as follows: User names are separated by blanks or new lines.  Multiple user name can  be  specified  on  a  line.
       Blank lines are ignored.  A comment mark (#) ends the line.

       After  modifying  the  local.users  file,  you  must  restart  the  sendmail  daemon  to  apply	the changes.  Use the following command: #
       /sbin/init.d/sendmail restart

EXAMPLES

       root postmaster rw  # A comment followed by an ignored blank line.

       # Another comment.  mariah    # Another comment.
	  carey  # Leading blanks are acceptable.

FILES

       Specifies the path name for the file.

RELATED INFORMATION

       Files: sendmail.cf(4).  delim off

																    local.users(4)

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