Support email split routing
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I am trying to figure out if I can disable internal routing for emails on certain domains.
We have split-rounting enabled with Google Workspace. I am able to receive emails just fine, but when I go to send an email to a mailbox on the same domain, I am getting a failure as it appears that cloudron is trying to find the mailbox internal to Cloudron vs. going out to the internet. Outbound email works fine for when sending to mailboxes not located within Cloudron. Is there a way to disable local mail routing?
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What is split routing ? Not sure I understand the setup. If Cloudron mail server is receiving emails for the domain, why should it go out to the internet for internal emails ? In fact, there is specific logic to make sure it doesn't go out.
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@girish Split routing allows for multiple email providers for a single domain. A reason for this (such as my use case) is that you might have inboxes for employees using Google Workplace, Microsoft Exchange, or Cloudron email for user account and then support inboxes for customer inquires or sales that you do not want handled on the same system.
More info on split routing: https://luxsci.com/blog/split-domain-routing-getting-email-for-your-domain-at-two-providers.html#:~:text=Split Domain Routing (SDR) is,addresses in the same domain.
In cPanel, you can change the setting to disable the "checks" to the local mail exchanger on a domain level. This allows cPanel to support split routing and other similar use cases. It would be nice to be able to do the same with Cloudron's email.
cPanel example: https://docs.cpanel.net/cpanel/email/email-routing/
If you enable "remote mail exchanger" on cPanel, it will force the MX lookup externally, even if the MX records simply point back to the same cPanel instance.
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@tamayers Ah, I understand the use case now. I will move this to Feature Request. It looks easy enough to add since we just need to disable the internal MX check.
