Adding MX record for Network Solutions email to Azure App Domain

I need to add an MX record into the app domain name purchased thru Azure portal. The default form to add a record set adds the .domainname after the mx record name.

The problem is that Network solutions says the MX record name must be mx1.netsolmail.net. (So in the portal it becomes mx1.netsolmail.net.domainname.com which is not what I need)

How can I add a record set in my DNS zone for that domain that doesn't end in the domain name?

Per the answer below I changed the settings to the following

When you purchase a domain in the app service domain page, you actually have a new domain provider because App Service Domains use GoDaddy for domain registration and Azure DNS to host the domains.

If I am understanding it correctly, you would like to have an email delivered on your app domain name through Network Solutions but keep your domain through Azure. If so, you could refer to this Mailbox Setup and configuration to change/edit your MX and CNAME records in the Azure DNS zone.

Try to change the MX record to inbound.[domain name].netsolmail.net if your domain name was janesbagels.com, your Mail Server record would look like inbound.janesbagels.com.netsolmail.net. Also, you could change the other two CNAME records mail and SMTP.

For example,