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Operating Systems Solaris Mailx sending but not receiving Post 302936485 by sparcguy on Thursday 26th of February 2015 12:10:48 AM
Old 02-26-2015
I hate mail problems they are not so easy to handle can spend up to days trying to fix mail issues. Most times related to dns or host resolution issues in /etc/hosts file or /etc/nsswitch.conf

from that server where you run the command is it allowed to send email to go out to internet?

do command
nslookup google.com

if cannot check /etc/resolv.conf if there are nameservers there check in /etc/nsswitch.conf if there is an entry
hosts: files dns



if you are only allow relay from this server to another server

1) what is your sendmail.cf DS pointing to? example DSsomemail means it's relaying to somemail server

try to telnet to the mail server at smtp port 25 send email from it see if you can receive.

root# telnet somemail 25
Trying somemail...
Connected to somemail.
Escape character is '^]'.
220 somemail ESMTP Postfix
mail from: darthvader
250 2.1.0 Ok
rcpt to: someone@gmail.com
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
test
test
.
250 2.0.0 Ok: queued as 16FA7160BA3
quit
221 2.0.0 Bye
Connection to somemail closed by foreign host.


if you can telnet and send email and receive it means it's could be some relaying configuration issues. If you cannot means there's also some other issue network dns firewall

I hate mail issues.
 

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System Administration Commands				 etrn(8)

NAME
etrn - start mail queue run SYNOPSIS
etrn [-v] server-host [client-hosts] DESCRIPTION
SMTP's ETRN command allows an SMTP client and server to interact, giving the server an opportunity to start the pro cessing of its queues for messages to go to a given host. This is meant to be used in start-up conditions, as well as for mail nodes that have transient connections to their ser vice providers. The etrn utility initiates an SMTP session with the host server-host and sends one or more ETRN commands as follows: If no client-hosts are specified, etrn looks up every host name for which sendmail(1M) accepts email and, for each name, sends an ETRN command with that name as the argument. If any client-hosts are specified, etrn uses each of these as arguments for successive ETRN commands. OPTIONS
The following option is supported: -v The normal mode of operation for etrn is to do all of its work silently. The -v option makes it verbose, which causes etrn to display its conversations with the remote SMTP server. ENVIRONMENT
No environment variables are used. FILES
/etc/mail/sendmail.cf sendmail configuration file SEE ALSO
sendmail(1M), RFC 1985. CAVEATS
Not all SMTP servers support ETRN. CREDITS
Leveraged from David Muir Sharnoff's expn.pl script. Chris tian von Roques added support for args and fixed a couple of bugs. AVAILABILITY
The latest version of etrn is available in the contrib directory of the sendmail distribution through anonymous ftp at ftp://ftp.sendmail.org/ucb/src/sendmail/. AUTHOR
John T. Beck <john@beck.org>
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