||Blocking Spam - The access File
The access file is similar to The
spammers File, but offers more options and
flexibility. For example, with the access file you
- Reject e-mail (e.g.
Spam) from specific users,
domains, IP addresses, and networks.
- Specify the text
(or use sendmail's default) of messages to return
to senders of rejected e-mail.
- Accept e-mail from
specific users within a domain, while rejecting e-mail from
all other senders in the domain.
- Reject e-mail sent
to specific local users.
There are also a
number of other features of the access file, which
are documented in the ~/usr/local/sendmail/cf/README
The access file functions can be installed by modifying
your sendmail configuration file (~/etc/sendmail.cf).
You can do this by using the sendmail M4 macros, which
include ready-to-use configuration files with the full anti-spam
support. Connect to your Virtual Server via Telnet
or SSH and do the following.
Install the sendmail
Copy your current
~/etc/sendmail.cf file to a backup location by
running the following command:
% cp ~/etc/sendmail.cf ~/etc/sendmail.cf.save
Install the new
anti-spam sendmail configuration file that is approprate
for your Virtual Server O/S.
Create a file
named local-host-names, if it doesn't exist already,
in your ~/etc directory on your Virtual Server.
In this file, list all the domains on the Virtual Server
that are allowed to recieve e-mail locally. The list should
be one domain per line. Previously, these domains were
listed on the
Cw line of the sendmail
Create or upload an ~/etc/access text file with the
format described in the documentation in the ~/usr/local/sendmail/cf/README
file. Then, issue the vnewaccess command:
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