Rejecting continuously changing incoming mail in postfix
I've read many post close to my subject regarding blacklisting incoming emails, but non of them described what I really want:
How can I reject a continuously changing email from my postfix, here is what I mean:
I think you got what I mean, the thing I've taken from the posts I've read is that I created a sender_access file hashed it and added the:
smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/sender_access
to postfix main.cf configuration
The sender access file reads:
But that didn't work, I know that there is some magical slashes and dots to be added to the sender_access, but I don't know which.
Can anyone please help me?
Thanks in advance
Unless you expect to receive mail from some legitimate @googlegroups.com, try simplifying your blacklist to *@googlegroupscom.
Here is an article on Configuring Postifx. Scroll down to "Fighting against SPAM" for an example of what to add to your config. Use www.google.com/linux for further searches on configuring postfix to fight spam.
You may have better luck if you combine postfix with spamassassin. Spamassassin has rulesets to filter spam on a variety of subjects. They are text files which you can edit to your needs, or create your own. You can get them here: http://wiki.apache.org/spamassassin/CustomRulesets
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