HOWTO Setup Nullmailer: Difference between revisions

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to be secure.
to be secure.
<br>
<br>
We use nullmailer on a number of servers, where minimalist functionality is all that is required.  All mail (typically only cron-job outputs, like '''logwatch''' and '''tripwire''' are then sent to our research-admin mailing-list, on bismarck.iat.sfu.ca.  From bismarck, the admin-list will fire off copies to all subscribed research-administrators.
We use nullmailer on a number of servers, where minimalist functionality is all that is required.  All mail (typically only cron-job outputs, like '''logwatch''' and '''tripwire''' are then sent to our research-admin mailing-list, on ponyexpress.iat.sfu.ca.  From ponyexpress, the admin-list will fire off copies to all subscribed research-administrators.


== Install Nullmailer ==
== Install Nullmailer ==
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This may pull in '''sys-process/supervise-scripts''' (or, you can emerge it manually), which will then require:
This may pull in '''sys-process/supervise-scripts''' (or, you can emerge it manually), which will then require:
  <font color=red>hostname</font> <font color=blue>~ #</font> '''rc-update add svscan default'''
  <font color=red>hostname</font> <font color=blue>~ #</font> '''rc-update add svscan default'''
  <font color=red>hostname</font> <font color=blue>~ #</font> '''ln -fs /var/nullmailer/service /service/nullmailer'''
  <font color=red>hostname</font> <font color=blue>~ #</font> '''ln -fs /var/spool/nullmailer/service /service/nullmailer'''
''(note:  older servers use the /var/nullmailer directory, rather than /var/spool/nullmailer...)''
Note:  you may have to create the '''/service''' directory first, by hand...<br>
Note:  you may have to create the '''/service''' directory first, by hand...<br>
<br>
<br>
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'''/etc/nullmailer/adminaddr'''
'''/etc/nullmailer/adminaddr'''
  admin@siat.sfu.ca
  admin@ponyexpress.iat.sfu.ca


'''/etc/nullmailer/defaultdomain'''
'''/etc/nullmailer/defaultdomain'''
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'''/etc/nullmailer/remotes'''
'''/etc/nullmailer/remotes'''
  bismarck.iat.sfu.ca smtp
  ponyexpress.iat.sfu.ca smtp


 
'''/etc/mailname'''
'''NOTE:'''
  $hostname.iat.sfu.ca
Suddenly, for one server only, mail stopped. mailq shows that delivey was attempted to defaulthost.iat.sfu.ca but failed :-(<br>
This was resolved by creating a new file:  '''/etc/mailname''' with the fully-qualified hostname.  Keep an eye open for similar breakage on other machines.<br>
July 31, 2012 - GRP.


== Status ==
== Status ==
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  Type your message, complete it with a '''ctrl-D + Enter'''
  Type your message, complete it with a '''ctrl-D + Enter'''
If everything is going properly, the adminaddr should receive a shiny new message in a short period of time!
If everything is going properly, the adminaddr should receive a shiny new message in a short period of time!
==Clearing the Queue==
  <font color=red>hostname</font> <font color=blue>~ #</font> '''rm /var/spool/nullmailer/queue/*'''

Latest revision as of 20:16, 27 February 2019

From the authour's web-site: Nullmailer is a mail transport agent designed to only relay all its messages through a fixed set of "upstream" hosts. It is also designed to be secure.
We use nullmailer on a number of servers, where minimalist functionality is all that is required. All mail (typically only cron-job outputs, like logwatch and tripwire are then sent to our research-admin mailing-list, on ponyexpress.iat.sfu.ca. From ponyexpress, the admin-list will fire off copies to all subscribed research-administrators.

Install Nullmailer

hostname ~ # emerge nullmailer -va

This may pull in sys-process/supervise-scripts (or, you can emerge it manually), which will then require:

hostname ~ # rc-update add svscan default
hostname ~ # ln -fs /var/spool/nullmailer/service /service/nullmailer
(note:  older servers use the /var/nullmailer directory, rather than /var/spool/nullmailer...)

Note: you may have to create the /service directory first, by hand...

and

hostname ~ # /etc/init.d/svscan start

Configuration

Edit the following files to configure the machine to send mail to our mailing server (Bismarck).

/etc/nullmailer/adminaddr

admin@ponyexpress.iat.sfu.ca

/etc/nullmailer/defaultdomain

iat.sfu.ca

/etc/nullmailer/me

$hostname.iat.sfu.ca

/etc/nullmailer/remotes

ponyexpress.iat.sfu.ca smtp

/etc/mailname

$hostname.iat.sfu.ca

Status

hostname ~ # mailq

Testing

(note: you may have to emerge mailx to get the mail command)
Send a message to root, then wait a brief moment for it to be picked up and sent onwards.

hostname ~ # mail -s "this is a nullmailer test" root
Type your message, complete it with a ctrl-D + Enter

If everything is going properly, the adminaddr should receive a shiny new message in a short period of time!


Clearing the Queue

 hostname ~ # rm /var/spool/nullmailer/queue/*