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Full Discussion: Email not working on Ubuntu
Operating Systems Linux Ubuntu Email not working on Ubuntu Post 302965257 by jim mcnamara on Tuesday 26th of January 2016 08:49:51 AM
Old 01-26-2016
That is saying that you are telling the mailserver (somewhere) not to send mail directly, please reroute it. And. The server designated as relay can't send the message.

You do not need to spend hours solving this. Simply use an out of the box install of your mailserver. I do not know zabbix, I understand sendmail somewhat - at least as much as normal humans can, Eric Allmann excluded. He wrote the original sendmail.

And so:

I am guessing: you tinked with some configuration files. I think your email is really messed up. It may not be your doing if the domain mailserver is hosed.

Therefore, revert to a vanilla install just on your desktop. Then change ONE (1) and only one thing. Test the mail. Send mail from root to a dummy user to start. Rinse and repeat until you have things set up correctly. And it works for local users, domain users and outside.

There usually are lots of example config files for mailserver setup out on the internet.

If one of the posters here knows your mailserver, then maybe direct help is available. But it is not me.
 

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MAILER.CONF(5)						      BSD File Formats Manual						    MAILER.CONF(5)

NAME
mailer.conf -- configuration file for mailwrapper(8) DESCRIPTION
The file /etc/mailer.conf contains a series of lines of the form name program [arguments ...] The first word of each line is the name of a program invoking mailwrapper(8). (For example, on a typical system /usr/sbin/sendmail would be a symbolic link to mailwrapper(8), as would newaliases(1) and mailq(1). Thus, name might be ``sendmail'' or ``newaliases'' etc.) The second word of each line is the name of the program to actually execute when the first name is invoked. The further arguments, if any, are passed to the program, followed by the arguments mailwrapper(8) was called with. The file may also contain comment lines, denoted by a '#' mark in the first column of any line. The default mailer is postfix(1), which will also start by default (unless specifically disabled via an rc.conf(5) setting) so that locally generated mail can be delivered, if the ``sendmail'' setting in /etc/mailer.conf is set to ``/usr/libexec/postfix/sendmail''. FILES
/etc/mailer.conf EXAMPLES
This example shows how to set up mailer.conf to invoke the postfix(1) program: sendmail /usr/libexec/postfix/sendmail mailq /usr/libexec/postfix/sendmail newaliases /usr/libexec/postfix/sendmail This example shows the use of the mini-sendmail package from pkgsrc in place of postfix(1): # Send outgoing mail to a smart relay using mini-sendmail sendmail /usr/pkg/sbin/mini-sendmail -srelayhost send-mail /usr/pkg/sbin/mini-sendmail -srelayhost Note the use of additional arguments. SEE ALSO
mail(1), mailq(1), newaliases(1), postfix(1), mailwrapper(8) pkgsrc/mail/sendmail, pkgsrc/mail/mini_sendmail HISTORY
mailer.conf appeared in NetBSD 1.4. AUTHORS
Perry E. Metzger <perry@piermont.com> BUGS
The entire reason this program exists is a crock. Instead, a command for how to submit mail should be standardized, and all the ``behave differently if invoked with a different name'' behavior of things like mailq(1) should go away. BSD
April 10, 2010 BSD
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