SPLIT DELIVERY

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Split Delivery configuration. Gsuite

mail dual delivery Gsuite

Apps > Google Workspace > Settings for Gmail > Hosts

Apps > Google Workspace > Settings for Gmail > Default routing

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Domains-> Add a domain alias

• Click on Save

Routing Settings:

Once the host details are saved, we need to proceed with adding the routing settings.

• Click on Apps >> Gsuite >> Gmail >> Advance Settings

  • Under General settings >> Scroll down to Routing >> Besides Routing >> Click on Configure.

• • Now scroll down to Route >> Click on Change Route >> Now select the Host name that was created in the previous step.

  • Eg: In the host settings we created a host with the name “Business email routing”.

• Scroll down >> Click on Show Options >> Now under Account types to affect >> Select Unrecognized / Catch -all

• Click on Add Settings.

This completes the split delivery setup for your domain name. Going forward if any email is sent, the email will be first routed to your Gsuite package. If the account exists under Gsuite the mail will be delivered successfully.

In case the email account does not exist, the mail will be routed to your Business/ Enterprise Email server and the message will be delivered to the intended recipient.

DNS Records:

1. Only one SPF record can be added for a domain name, In this case, since we are using multiple email servers we will have to club the SPF records.

2. Identify the correct DNS Zone for the domain name and add the mentioned record in the current dns zone.

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Create a new host with these settings:

•  You may name the route anything you like. Be sure to replace your-server's-ip-address with your IP. On Plesk 12.5, your server's IP is listed in a panel on the right side of the home screen. Another option is to modify the host that already exists by disabling the Require TLS delivery option. 

2. Select G Suite > Settings for Gmail > Advanced settings. Click on the Default routing tab and then Add Setting. 

3. Configure the alternate route for email addresses that are not managed by G Suite.  This allows you to add and remove addresses in Plesk without having to configure anything else through the G Suite interface. 

• Step 1: Select All recipients from the drop-down menu.

  • Step 2: Select Modify message from the drop-down menu. Leave the Headers section blank unless you need to specify otherwise. Under Route, select change route and then select the name of your host.

• • Step 3: Select perform this action only on non-recognized addresses and click Save.

4. SSH to your server and modify the main.cf file so that Postfix does not check outgoing email against your domains and attempt to route mail locally. You must do this, or attempting to send mail from your VPS to any Gmail managed addresses that are @yourdomain.com will fail. This is because Postfix will first look for the address on the local server.

vim etc/postfix/main.cf 

Add the line that tells SMTP to not reject email that matches local recipients. The value is supposed to be blank.

local_recipient_maps = 

save and quit

:wq

Reload postfix with the updated configuration. 

postfix reload

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