The access file is similar to The spammers File, but offers more options and flexibility. For example, with the access file you can:
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 file.
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 server via Telnet or SSH and do the following.
Install the sendmail Configuration Utilities.
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 server's O/S.
% cp ~/usr/local/sendmail/cf/cf/default.cf ~/etc/sendmail.cf
% cp ~/usr/local/sendmail/cf/cf/default-sun.cf ~/etc/sendmail.cf
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NOTE: The anti-spam rules require an ACL account with mail-abuse.org in order to function. To learn more about getting an ACL account, go to MAPS Fee Structure page. |
Create a file named local-host-names, if it doesn't exist already, in your ~/etc directory on your server. In this file, list all the domains on the 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 configuration file.
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:
% vnewaccess