Re: [exim] getting exim to accept mail on a domain without a…

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Author: Jasen Betts
To: exim-users
Subject: Re: [exim] getting exim to accept mail on a domain without an MX DNS record.
On 2021-11-19, russellbell--- via Exim-users <exim-users@???> wrote:
>     I'm trying to configure a domain that has never accepted mail
> from external sources to start.  The server runs exim, which I've
> never used.  I send a message to the domain using its IP, for example
> fred@123.456.789.012.  exim returns:

>     'rejected RCPT : The mail server could not deliver mail to
>     'fred@123.456.789.012.  The account or domain may not exist,
>     'they may be blacklisted, or missing the proper dns entries.'

>     dig mx 123.456.789.012

> returns NXDOMAIN.

MX is not required. do you have a DNS record for your domain
(like you claim in the subject) or do you only have an IP address?

You probably need to configure [123.456.789.012] as one of the domains
that exim accepts for. you may need to enable IP literal domains too.