Mailx sending but not receiving Post: 302936485

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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

02-26-2015

Registered User

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.

sparcguy

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LEARN ABOUT ULTRIX

mconnect

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)