Re: [gentoo-user] Filtering spam for a business address

["Preston Hagar" <prestonh@gmail.com>]

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>
> > http://www.freesoftwaremagazine.com/articles/focus_spam_postfix/
> >
>
> That's a great article.  Where do you implement the changes he
> suggests on the first page?  I searched /etc/postfix/main.cf for the
> configuration options but they aren't there.
>
> - Grant
> -


Just add them to main.cf and do a /etc/init.d/postfix reload  (make sure not
to include the line numbers in his examples)

For the lines that reference external files, you will have to create the
files and the content and the issue the command:

postmap <filename>

The guide puts all of the files in /usr/local/etc/postifx, but I just put
the files in /etc/postfix  (If you put the files in /etc/postfix instead of
/usr/local/etc/postfix, make sure to change the path main.cf).  I left off
the spf filter since it seems that many people still have not adopted spf.
Postgrey is great and I use it on my person email server, but I left that
off of the business system I manage.  I work for a real estate company and
postgrey can delay email by 4 hours or more depending on the sending server
configuration.  Although no one should depend on email for speedy delivery,
it is my experience that most users expect it.  All of the other options
have really helped a lot and cut down on spam.

A couple of things to remember, each time you change main.cf or any other
postfix configuration file, you need to issue the command:

/etc/init.d/postfix reload

to get postfix to take the new configuration changes.

Also, if you change any of the external files that main.cf refrences, you
need to  do a :

postmap <filename>

and then
/etc/init.d/postfix reload

It is probably a good idea to tail your mail logs for a while after you make
the changes just to make sure you are not blocking anything you didn't
intend
to.

tail -f /var/log/mail/current

or

tail -f /var/log/mail.info

depending on your logger.
Also, I would recommend sending email to an account on your new system from
any and all external email accounts you may have such as yahoo or gmail just
for extra testing.

Good Luck,

Preston

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