Re: [exim] Retry on 550 errors

Dave Lugo wrote:
> On Tue, 5 Dec 2006, Marc Perkel wrote:
>
>> That's possible. How would you know in advance that the target server
>> will start to refuse email once the MX has changed?
>>
>>
>
> Why would the target care if the MX was changed? All
> that should matter, is that the domain is provisioned.
>
> Any MTA that allows an MX to decide whether or not a rcpt_to
> domain should be accepted, is a DoS waiting to happen.
>

Unfortunately I have no control over the other end. But that's how some
people set it up.