SpamBlocked blacklist_to ?

[bwrob]

Hi
How to use blacklist_to in Jeff's exim.conf with
Spam Assassin.
Something like if To: contains example.com or
[email protected].

Any idea.

Thanks
bob

 

[Wanabo]

I realize my answer comes 12 years later, but I'll post my answer any way because I was struggling with the same question and I might found the solution. If not then I hope the experts will jump in.

At first I created a file named blacklist_to in etc/virtual and filled it with email addresses that never should receive mail.
After a night with this setup I realized it didn't work because spammers received the registration mail and could sign up.

After some more digging I tried this:

In DA under user level you can configure Spamassassin Setup and Manually edit the config file yourself (scroll all the way down).
Add for example:

blacklist_to *@gmx.com
blacklist_to *@mailforspam.com

Save it and you're done.

 

[Wanabo]

Update: My solution above does not work. Spammers still receive their activation mail.

That is a pity, hoped I could manage an email blacklist server wide rather than blacklisting per website.

 

[zEitEr]

Hello,

Update system filter /etc/system_filter.exim for global change.

 

[Wanabo]

Update system filter /etc/system_filter.exim for global change.

Thanks for your reply.

Looked at the file but don't know how to proceed.
Is this the correct file?

It's about:

## Exim system filter to refuse potentially harmful payloads in
## mail messages

I want to to block outgoing emails to specific email addresses.

 

[zEitEr]

Yes, it is. It can be used to globally filter both incoming and outgoing emails.

http://www.exim.org/exim-html-current/doc/html/spec_html/filter_ch-exim_filter_files.html

 

[Wanabo]

Indeed it can! Thanks for pointing me in the right direction.
Although I had to do a lot of searching and digging I finally came up with a working (tested) solution.

Add this to the bottom of /etc/system_filter.exim

## custom
if $header_to: contains "@mailforspam.com"
    then
    fail text "This message has been rejected"
    seen finish
endif

Not sure if a modified /etc/system_filter.exim file will survive a exim build or upgrade. So make a backup of your changes.

 

[zEitEr]

Good to know you've found a working solution. As for file updates, I've never seen it overwritten or changed with any software update. Anyway you might consider using chattr to add immutable attribute to the file.