Collection of e-mail address database

Good afternoon!

It is necessary to collect the e-mail addresses of institutions:

1. Educational institutions (according to statistics in Russia at least 120,000 budget educational organizations)

2. Medical organizations (about 30 000 organizations, only budgetary ones are interested)

3. Social services organizations (about 30 000 organizations)

Interested in email, ideally broken down by region and type of institution.

It is interesting to collect the most complete and relevant bases.