[Dnsmasq-discuss] Wildcard / catch all Mail eXchanger (MX)

Cyberfusion wedwards at cyberfusion.nl
Fri May 7 14:53:13 UTC 2021


> Op 7 mei 2021 om 16:33 heeft Mark <dnsmasq at resimplify.net> het volgende geschreven:
> 
> 
> 
> Hi,
> 
> I know there are MX related configuration options which can be used in dnsmasq.conf (mx-host, mx-target, selfmx and localmx) - however, none of them appear to be able to deliver the specific functionality I'm looking for...here's what I'm trying to do...
> 
> I have an internal network that is using dnsmasq for name resolution and some (not all) hosts are using it for DHCP.
> 
> I would like dnsmasq to deliver a single MX record back to MX queries from hosts on my internal network no matter what mail domain is being included in their MX query - i.e. a 'wildcard MX' (which I'll point to my SMTP smarthost).

Not an answer to your question, but have you considered using something like nullmailer?

> 
> The description of the 'mx-host' option in dnsmasq's man page makes reference to this type of requirement ("for directing mail from systems on a LAN to a central server") - however, dnsmasq still appears to need to be configured to provide responses only for specifically mail domains ("hostname") MX requests.
> 
> Essentially, I believe I want to specify a wildcard as the "hostname" (really "mail domain").
> 
> I wondered if it's possible to deliver this functionality with the current dnsmasq?
> 
> Appreciate any insights you're able to share.
> 
> Thanks in advance.
> 
> Mark
> 
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