How do I build a cold email list of prospective freelance clients without paying for expensive tools?

[Btaliat]

To be factual, getting email addresses of clients sometimes may be very difficult but it doesn't mean that it cannot be done in a simple way. You only need to know how to get it done. For instance, you can easily find the clients, using LinkedIn. When you get your target clients, you can use free email tools to verify their emails before starting sending them what you are up to. Do you have another method?