Change MX Records?

I spoke with the company I use for my domain. I would like to use their web mail services over Infinity as Infinity doesn’t provide me with what I want for this. They have told me to get in contact with the admins of here to update my domain with certain MX records. Who can do this? Thanks.

You can do this! Just hop into the control panel and go to the section conveniently called “MX Records”.