Here is how to gain access to one of the best email validator plugins. It will be thru a platform called apify, you can use code APIFY4UNIS for 50% off, so you will get the cheapest plan for 19.5 dollars, goving you 39 dollars use. Use the email validator which Im indeed affiliated in: https://apify.com/amr-mando/email-verifier You will verify 1k emails for 1 dollar., so you get 39k email validations. Another cheaty tip, you get free 5 dollar usage in apify, you can abuse it to use the actor for free 5k validations. Input the whole CSV and get it back, no manual input akd match. Very simple to use and its using one of the best services as a backend for validation with almost all validattion checks. I can guarantee a less than 0.5% bounce rate with only using deliverable emails. Will also show providers of the email and all other details.

We are in the home remodeling niche and would be curious your what your acqusition methods are if you also work with contractors. Only reliable source of leads we have right now are paid ads. Do you cold call? If so, do you also get a horrible show rate? We typically get a 15-20% show rate with cold calls.