[EMAIL PROTECTED] wrote:
Hi,
i have a problem with stopping spams. The situation is this. Spammers
are using our domains to send spam to us. This is one of the example:
Let's think that one of the our domains is mydomain1.com and
[EMAIL PROTECTED] is real user in our system.
The spammers send me mail this way:
HELO spammer.com
MAIL FROM:<[EMAIL PROTECTED]>
RCPT TO:<[EMAIL PROTECTED]>
DATA
this is a spam
.
RSET
QUIT
This is the scenario that spammers use to send spams to my users.
What i want to do is to stop spammers to send me this way spam to my
users.
Is there some way to block this way, or to set some kind of
authentication only if in MAIL FROM: field they use our domains?
How can i solve this problem at all?
smtpd_recipient_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
check_sender_access hash:/etc/postfix/access_sender
...
== access_sender
mydomain.example REJECT blah blah
...
