There is a website with a list of company names telephone numbers and their web site addresses listed.
You need to go online to this web site.
You must copy and paste the company name and telephone number into a row of the spead sheet
Then click the link for each companies web site, load the web site and find the companies e-mail addresses on their web site
Copy and past these e-mail addresses onto a spead sheet in the same row as the comany name and telephone number.
Data entry must be accurate. Estimated number of companies on list 3600