> Sander Holthaus wrote:
> > Would it be possible or would you consider making a bofh-option to 
> > refuse such addresses?
> 
> Why don't you do what Sam already suggested on 2005-01-19?

I did. And it is working, but it is not a permanent and foolproof sollution.
The problem is:

Sam Varshavchik wrote:
> Sander Holthaus wrote:
> > Thanks! Can I use whildcard in that expression, e.g. badmx 127.0.0.* 
> > And
>
> No.

Meaning to create a foolproof sollution, I would get a huge bofh-file
(unmaintainable and will probably seriously slow down Courier).

Second, I think that there are valid reasons to create a bofh-entry to
disable certain addresses as MX's. If RFC 3330 states on 127.0.0.0/8 "no
addresses within this block should ever appear on any network anywhere" and
spammers are starting to abuse the fact that no-one blocks this address
range in public DNS-records, why not make an easy way (bofh-option or
wildcard expressions in badmx) to block these?

The same can be said on other private address-spaces. If I know that I reach
any network using private address-spaces, why should I allow someone to send
mail whose MX-server is in such an address space? This can only be abused or
point to configuration errors.

Kind Regards,
Sander Holthaus



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