@pipetko
Well, emails are completely handled by PHP mailer library and currently, there is nothing better than PHP mailer library.
That is true, but why it is not working without email settings / server set up?!
Havent tested in your version yet. But until Now from when I am using osclass, it never worked sending emails without set up email settings. Currently with one of the websites I maintance is with not set up email server and it is not sending emails. Only the Contact form of the website is working. User emails are somewhere, nowhere. later we set up Mail server and it is working with the propper settings ( no ssl offcorse, SSL never worked ). Now it is sending emails BUT here is another problem. Now the email server of the web hosting is blocking email by automated bot. I was labeled as spammy email because sending notifications of the users. They remove the mail and domain from the list but some days later it is again blocked. That is why I hate using email set up server. In wordress I never spammed my domains because using only php without connecting it to the provirder's mail servers I only receive messages there and no problem... Its a long storry but its a pain in the .... this with the mails. So now even with set up mail server the website is not sending most of the mails and the client made me to remove the account mail verification on user register. Later the owner changed the webhosting and there was the same problem.