It’s all very well using a free email service but when it comes to business and efficiency you may want something a little better. Fastmail is that something better. One of the most popular file sharing services is Dropbox, a service that many businesses and professionals use. Fastmail gives you access directly to your Dropbox files so you can easily attach anything.
The user interface is very well organised and complimented by a fabulous search facility so finding past emails is very quick. I have used this service for the last four years and would not think of changing, it costs nothing to give it a go.
Do you have a domain name? you can integrate the email part of it into Fastmail in order to keep continuity of your business.