How to send private messages from the site to social network users?

Question

PHP

I have searched for ads on my site. Site users can save the search. Saved searches (if a matching listing is added) are notified by email. How to make it so that he can also receive a personal message in a contact, for example? Those. I understand that this is done through the API, the user himself enters and grants rights, it turns out that we need access rights to write personal messages, but how can we do this so that the message comes on behalf of our group in VK?

Answer 1

Then you need permission from your group to send messages, nothing is required from users. Unless you just specify your VK (you can also use the API)