Setting up a Nagios box at home, but I`m having trouble getting email notifications to send.

Nagios appears to be working fine. It is monitoring devices but alerts are not being sent.

I get the following error in the maillog:

=
Jul 21 11:48:53 nms postfix/pickup[2271]: 3494B7A6D: uid=0 from=<root>
Jul 21 11:48:53 nms postfix/cleanup[2546]: 3494B7A6D: message-id=<20130721154853.3494B7A6D@nms.localdomain>
Jul 21 11:48:53 nms postfix/qmgr[2272]: 3494B7A6D: from=<root@nms.localdomain>, size=434, nrcpt=1 (queue active)
Jul 21 11:48:53 nms postfix/smtp[2548]: 3494B7A6D: to=<myemail@address.com>, relay=mail.cogeco.ca[216.221.81.25]:25, delay=0.31, delays=0.13/0.03/0.12/0.02, dsn=5.0.0, status=bounced (host mail.cogeco.ca[216.221.81.25] said: 553 Postmaster Code 6 - #5.1.8 Domain of sender address <root@nms.localdomain> does not exist. Le domaine <root@nms.localdomain>, utilis?? pour envoyer le courriel, n'existe pas. (in reply to MAIL FROM command))
Jul 21 11:48:53 nms postfix/cleanup[2546]: 911A97A7A: message-id=<20130721154853.911A97A7A@nms.localdomain>
Jul 21 11:48:53 nms postfix/bounce[2549]: 3494B7A6D: sender non-delivery notification: 911A97A7A
Jul 21 11:48:53 nms postfix/qmgr[2272]: 911A97A7A: from=<>, size=2581, nrcpt=1 (queue active)
Jul 21 11:48:53 nms postfix/qmgr[2272]: 3494B7A6D: removed
Jul 21 11:48:53 nms postfix/local[2550]: 911A97A7A: to=<root@nms.localdomain>, relay=local, delay=0.13, delays=0.04/0.03/0/0.05, dsn=2.0.0, status=sent (delivered to mailbox)
Jul 21 11:48:53 nms postfix/qmgr[2272]: 911A97A7A: removed
==

Not sure what this means or how to fix it. Postfix has me confused.

Any help would be greatly appreciated.

Thanks
Brad

Reason for failure 553 Postmaster Code 6 - #5.1.8 Domain of sender address
Remote mail server mail.cogeco.ca
Reporting mail server nms.localdomain

You must add your own domain’s equivalent of the following lines to the /etc/mail/domaintable database file.
*.example.org example.org

I don't see a /etc/mail anywhere.

Does anyone know anything else I can try. This still isn't working. Would appreciate any help here.

Check /etc/postfix/main.cf

http://www.postfix.org/BASIC_CONFIGU....html#myorigin

Hope that works.