You could go with something like:
email@example.com altough having your name or your company name - depending on which you use to advertise yourself - at the begining of your email might be the best idea for the following reason.
Most of the people who will be contacting you with professional inquiries have many different contacts in their mail box/ mail client, from my own experience I know that it is a great convinience having to just type initial letters of a company I want to contact or name of a person - which I don't have to remember fully - because the mail client will suggest contacts that have been used in the past and make it much easier if I contact them only once in a while and don't remember their email. Some mailing clients might be strict on the letter placement in the email and will only look for adresses starting with the letters you type in and look for those in the domain name after the
In conclusion, in my opinion it is the best to have your email start with whatever you want your clients to associate you with, be it your name, your company name etc.