A simple solution may be to read the

domainlist local_domains =

from a flat file that needs to hold the names of the user defined domains, and keep BOTH routers in their original configuration.

On 14.02.2018 10:28, Cyborg via Exim-users wrote:
Am 14.02.2018 um 09:59 schrieb Bambero via Exim-users:
So what shoud I do to fix that? I can't use local_domains, becouse it's
shared hosting, and users can add domains by hand.
If someone will add domain 'gmail.com' exim will treat it as local domain.

The only way is to check MX.

There is no easy solution to the problem. Local domains defines those
domains, the server shall receive email for.

You could add a rule  to the check_rcpt acl , to see, if  IN MX of the
domain points to your server. It's doable,
but could be tricked also.

Way easier is to blacklist domains, you will never serve emails for like

domainlist local_domains = @ : localhost : localhost.localdomain :
${lookup mysql {  SELECT domainname FROM .. WHERE ... AND DOMAIN NOT IN
( "gmail.com","t-online.de","gmx.de","gmx.net","outlook.com" .... ) }}

You could also build an sql with a db defined blacklist, which would be
easier to maintain.

Hope that helped,

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