Website for buyer, website for seller, how many email addresses?

[Jalen Brinkerhoff]

I am in the buildup phase of my wholesaling company. I want to register a domain, and register an email with that domain. I have a company name for my business but will have two different domain names with one having content targeted towards the sellers, and one targeted with content for the buyers. 

My question is if you have a subscription box on you site where sellers can enter their property info, and one for your buyers page where buyers can register to be emailed for your deals...what is your email that you respond back to them with?

1) Do you do two email accounts? For example

JohnD@xyzrei --> Buyer site email for xyzrei.com     &  JohnD@xyzbuyshomes ---> Seller site email for xyzbuyshomes.com

2) Or one email account for two sites?

JohnD@xyzbuyshome ----> Email you use to respond to buyers & sellers?

I think this is important to know because it determines what you put on your business cards among other things with importance. I just want to move from this stage and would like to hear how other do it?