reject mail for specific address

[nix45]

Postfix 2.0.x

I have a "catch-all" set up for my domain so that all mail for @foo.org is delivered to the same account (using the virtual table). I started getting spammed at this one address, spam@foo.org. How can I reject any mail sent to spam@foo.org? I want the spammers to receive an NDR about the address not existing.

Thanks,
Chris

 

[bluegroper]

Sure you can do that.

1. Edit your main.cf
Include the following line
smtpd_sender_restrictions = hash:/etc/postfix/access

2. Edit your /etc/postfix/access
Follow the instructions in the file, and include a line like
somebuddy@nowhere.com 550 REJECT

3. Create your hash table with command
postmap /etc/postfix/access

4. Reload your main.cf with command
postfix reload

5. Test it with a good friend's email address, or a spare one of your own.

6. Check your logs regularly to make sure the offending email is being bounced, and NOTHING else.

ßG

(If your postfix is an "off-line" server, there's a few other potential steps to deal with fetchmail, but you get the idea.)

 

[bluegroper]

Ooops sorry,
I've re-read your question and realise that I misunderstood.
Will give your problem some more thought.

 

[piti]

you can use
a) header_checks
b) smtpd_recipient_restrictions (check_recipient_access)
c) this config i found once on inet (not tested):

[i]
/etc/postfix/master.cf: 
        ... 
        discard unix - n n - - pipe user=nobody argv=/bin/cat /dev/null 

/etc/postfix/transport: 
        ...
        # All mail to the domain "discard.invalid" is discarded. 
        # 
        discard.invalid discard 


/etc/postfix/virtual: 
        ... 
        # Discard specific user in example.org 
        # 
        userexample.org discard.invalid 


        # Discard all recipients in example.net 
        # 
        example.net discard.invalid 


/etc/postfix/main.cf: 
        ... 
        virtual_maps = hash:/etc/postfix/virtual 
        transport_maps = hash:/etc/postfix/transport 
[/i]

 

[nix45]

I figured it out...

/etc/postfix/main.cf:

smtpd_recipient_restrictions
check_recipient_access hash: /etc/postfix/unwanted_recipients
check_relay_domains


/etc/postfix/unwanted_recipients:

spam@foo.org REJECT


Then I ran...

postmap /etc/postfix/unwanted_recipients
postfix reload



Chris