The second way to find an email address may seem a little trivial at first glance, but it quite frequently leads to success. If you know your contact’s name and company, but not their exact address, you can try to guess.
Large companies generally have set up a reference structure on which they rely to assign their addresses. If you find several emails on the page, which are structured according to the principle “firstname.lastname@company.fr”, for example, you can deduce the address you are looking for and write to him. In this case, your email should not contain any confidential information, but only a request for a response.