[Pkg-exim4-users] how to reject mails when Reverse DNS check fails?

[Hans Ekbrand]

On Mon, Sep 12, 2011 at 08:27:19AM +0200, Johann Spies wrote:
> Hallo Hans,
>  
> 
> On Sat, Sep 10, 2011 at 01:08:41PM +0200, Hans Ekbrand wrote:
> > Dear exim users,
> > 
> > I want to reject mail when Reverse DNS lookup fails, currently I only
> > get a warning - like this:
> > 
> > X-Host-Lookup-Failed: Reverse DNS lookup failed for 203.211.146.24 (failed)
> > 
> > I have
> > CHECK_RCPT_REVERSE_DNS = yes
> > CHECK_RCPT_SPF = yes
> > 
> > in /etc/exim4/conf.d/main/00_local_options
> > 
> > How do I configure exim to reject instead of warn?
> 
> I did this to find the answer:
> 
> % sudo rgrep CHECK_RCPT_REVERSE_DNS /etc/exim4
> /etc/exim4/exim4.conf.template:  .ifdef CHECK_RCPT_REVERSE_DNS
> /etc/exim4/conf.d/acl/30_exim4-config_check_rcpt:  .ifdef
> CHECK_RCPT_REVERSE_DNS 
> % vim /etc/exim4/conf.d/acl/30_exim4-config_check_rcpt 
> 
> You can change the 'warn' in the section where CHECK_RCPT_REVERSE_DNS is
> used to 'deny' 

Thanks, Johann and Akihiro!