If you want to combine email marketing from different domains, you can use an email marketing platform that supports multiple domains. This will allow you to manage all of your email marketing campaigns in one place, even if they are using different domain names.
Here are the steps to combine email marketing from different domains:
Choose an email marketing platform: There are several email marketing platforms available, such as Mailchimp, Constant Contact, and Campaign Monitor. Choose the one that best meets your needs and supports multiple domains.
Set up your account:Sign up for an account with the email marketing platform. Follow the instructions provided by the platform to set up your account.
Add your domains: Once you have created an account, you can add the domains that you want to use for your email marketing campaigns. This can be done by entering the domain name and verifying ownership.
Set up email campaigns: Once you have added your domains registration, you can set up your email campaigns. This can be done by creating templates, adding content, and selecting your audience.
Test and send your campaigns: After you have set up your email campaigns, test them to make sure they are working correctly. You can then send your campaigns to your audience.
By using an email marketing platform that supports multiple domains, you can combine email marketing from different domains into one platform, making it easier to manage your campaigns and track your results.

you can forward your emails from different domains to one, check your email settings to see they provide that service.