Ask HN: Cold emailing to increase freelance business?

Having recently moved to a non-tech area due to new baby (due anytime now) I was wondering if any freelance/contract developer had any success cold emailing potential clients (general companies, web development agencies, etc..) to offer my services.

I guess this would work on a high scale (emailing more than 50 companies/day) but real data would be beneficial.

Thanks

Filipe Moreira

www.filipemoreira.com @filipeamoreira