That wouldn't help you much.   Many mail systems these days check not only your 
MX record but also your PTR record to make sure the IP you came from has a 
valid (i.e. not generic) reverse lookup.   They'll also check things like dkim 
or spf TXT records.   If they don't like what they find they'll simply reject 
email even if you haven't been blacklisted.

In general blacklisting services blacklist specific IPs rather than domains 
anyway.   A work around would be to change the outbound IP your mail server 
uses rather than changing other records.  Of course you'd have to make 
additional changes for the PTR, A/AAAA and TXT records for the new IP you 
select. 

Many blacklisting services have a way to delist yourself.

However, if you don't fix the underlying problem that caused you to be 
blacklisted in the first place any new IP will quickly be blacklisted as well 
and/or delisting yourself a second time is much more difficult.

If you are sending multiple automated emails (e.g. invoices or marketing 
materials) to customers you need to be monitoring for returns and removing 
rejected email addresses from your databases.   These often occur because the 
customer no longer has the email address they originally gave you (or they had 
a typo in what they gave you).

-----Original Message-----
From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Tom
Sent: Thursday, November 08, 2018 11:49 PM
To: bind-users@lists.isc.org
Subject: Re: Rewrite/Override QTYPE with RPZ

Fore example "example.com" and "*.example.com" are blacklisted. I would like to 
return a real ip address for special query types like MX or TXT, but not for A 
or AAAA.

Tom


On 08.11.18 16:44, Barry Margolin wrote:
> In article <mailman.775.1541690246.803.bind-us...@lists.isc.org>,
>   Tom <tomtux...@gmail.com> wrote:
> 
>> Hi all
>> Is there a way to override/rewrite QTYPE (ex. MX) with RPZ? If no, is 
>> this planned in future releases of BIND?
> 
> What would be the point? If a query is for MX, and you return A 
> instead, the client won't be able to do anything with it.
> 
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