I rarely communicate 'cold' through e-mail with a business.
A typical business gets 100's-1000's of spam and most e-mail goes into the spam/junk mail folder. Especially if it was created in Hotmail, Yahoo, gmail, even Comcast, Rogers, etc.... Sometimes even addys from legit companies get directed into the spam/junk folder automatically.
For example I get over 200 junk mails a day! My spam/junk folder is emptied everyday and to be honest, I don't search whether an e-mail in my spam/junk folder is legit or not. I just empty the entire folder. I leave it up to the person who wants to e-mail me to call me, and only then will I put their e-mail addy into my safe list. I suspect most people do this.
I'd suggest you give them a call.
Regards, Art.