Re: [exim] Force authenticated local mail to use DNS

> On 4 Feb 2016, at 08:39, mtrainer@??? wrote:
>
>
>
> On 2016-02-03 18:51, Jasen Betts wrote:
>
>> On 2016-02-03, mtrainer@??? <mtrainer@???> wrote:
>>
>>> Hi, Emails from our authenticated senders try to deliver locally if the domain is in our ldap directory even if the DNS MX record for the domain points externally. Is it possible in exim to make authenticated emails use the DNS MX instead of just delivering internally if the domain is in our ldap directory. This of course can't break normal incoming emails. The contents of our routers.conf file is below. Some advice on how to solve this problem would be greatly appreciated.
>>
>> yes, you'll have to remove those domains from the "local_domains" list
>>
>> -- _(ツ)_
>
> Hi Jasen,
>
> Thanks for the reply. In an ideal world it would be as simple as that.
> The problem is that customers just change their mx and leave their
> existing mail / domains on our system. It is difficult to detect when
> customers change their mx especially when we have 70,000+ domains.

Hi,

In a domain list, you can include "@mx_any" without the quotes. It matches any domain that you are an MX for. See section 10.8 of the docs for details: there are several. Even if your host isn’t the target of the MX record, you can list valid hosts in hosts_treat_as_local

--
Ian Eiloart
Postmaster, University of Sussex
+44 (0) 1273 87-3148