Begin forwarded message:
> From: Dominic Benson <dominic@???>
> Date: 10 March 2014 09:51:59 GMT
> To: Mike Pearce <mike.pearce1990@???>
> Subject: Re: [exim] Split Delivery
>
>
>> On 9 Mar 2014, at 17:13, Mike Pearce <mike.pearce1990@???> wrote:
>>
>> Hello,
>>
>> I'm attempting to set something up but I don't have very much experience with Exim so I was hoping someone could help me.
>>
>> Basically I have my domain setup at Zoho.com (Business Email) and have staff email addresses being served there. I want to use our server as a mail server for our domain as well for departmental email and such.
>>
>> Zoho provides the option for Split Delivery which I can point to my server and then when someone sends an email to my domain that doesn't exist at Zoho, their server will automatically reroute it to the destination of choice, being my server.
>>
>> When I try to send an email from my server to a staff email over at Zoho, it returns saying unknown user and this is because Exim see's the domain locally and attempts to deliver it locally whereas it needs to deliver it remotely either by checking the MX entries or via another method.
>
> Your best bet is probably a manualroute router before local delivery, checking against a list of e-mail addresses handled by Zoho. Ideally you want to auto-generate that list periodically (or alternatively do a live directory lookup if that is supported by them).
>
> The risk in treating Zoho as a fallback to local delivery is that, unless you are careful with your ACLs to catch them, messages addressed to nonexistent accounts could just keep going backwards and forwards.
>
>
> Dom
