I have two email addresses which are public, however when I reply, it would only be from my primary address. This is to keep things simplified and easier for both parties. I do use my secondary email for select companies, but this is the exception rather than the rule.
This is my primary email address and the address I use for all of my personal contact. This address is connected with the pilone.name domain which I own. While this may look confusing to some, the .name addresses are recognized as an official domain TLD.
This address is used with certain companies when I would need support. Examples of these companies will include my registrars, and hosting company. Any personal correspondence to this address will be replied from my primary email address.