Email spam, which is also know as junk email, are identical email messages sent to several email recipients. This could be emails sent by companies for marketing purposes, email sent bring user to phishing web sites, etc.<\/p>\n
Usually these emails are sent using some scripts to a huge number of recipients.<\/p>\n
Plain SMTP servers by default is not meant to analyze the emails and categorize them. They receive any email that comes it based on the basic checks. We make use of other applications such as spamassasins that filters spam mails based on content-matching rules<\/p>\n
Follow the steps mentioned in my previous posts to install postfix<\/p>\n
Install spamassassin, which is available ini common repositories<\/p>\n
Edit the spamassasin’s configuration file as follows:<\/p>\n
Add a new user to manage the spamd service<\/p>\n
Configure postfix configuration file<\/p>\n
Find the line that starts with “smtp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inet<\/strong>” and edit it to looks as below:<\/p>\n Add the following line at the end of master.cf<\/strong><\/p>\n Verify the following file:<\/p>\n Issue the following commands:<\/p>\n Add the following commands in a cron job to do it regularly<\/p>\n Restart the mail services<\/p>\n Test<\/strong><\/p>\n Send a mail to user balbox with the below subject. This will be marked as spam:<\/p>\n XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X<\/p>\n","protected":false},"excerpt":{"rendered":"\n
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