Targeted Leads for our export business

If do my export business, I want a lead for this business and that lead has to be converted to sales. So you want to work on this project. So tell me the next step. I want to send many emails at once time, but when I send many mails at once, emails get suspended or bounced and the mail goes to spam and promotion without showing the inbox of the mail receivers. There is no such thing as a good opening rate. So you can solve my problem