How to use same domain at multiple mailing server. i want to use single domain with multiple delivery servers [ multiple ips ] as well.

Hello,

Just came across this answer and decided to write some general guidelines for anyone who comes across this in the future despite the old question.

In order to achieve this, you can set up multiple MX (Mail Exchanger) records for your domain’s DNS settings. It helps distribute the incoming emails across different servers, improving fault tolerance and load balancing.

Here’s a simple example of setting up multiple MX records:

**example.com.    IN    MX    10 mail1.example.com.**
**example.com.    IN    MX    20 mail2.example.com.**

Each MX record should have a priority number assigned to it, lower the number, higher is the priority. Your email will be first attempted to be delivered to the server with the highest priority. In case it fails, the next attempt will be made on the server with the next highest priority.

For more information on setting up MX records in DigitalOcean, please check out this link: How To Set Up a Host Name with DigitalOcean.

Hope that this helps!