Hello. I got this website and we sell a very niche repair for ophthalmology clinics (phaco handpiece repairs, which is a particular part of a common equipment). I have a list of approximately 5000 useful emails that could be my starting point, so Nr. 1 priority is to find a good way to be able to mass mail them without getting bounces all the time. tried gmail but that probably didnt go too well. My website is rather new. Only a couple of months since I finished it. So I probably going to need on-site SEO and any other modifications that might be deemed necessary. Then of course off site SEO and/or google adwords whatever should have highest ROI. Or any other service actually. Please, pm with what you can offer. Any free advice is always very welcome .