Hi @sanzeeb3,
Thanks for your interest. ??
By reason of the fact that I couldn’t receive an answer for a long time, I solved the problem with gmail (via Oauth).
Actually, I tried all solutions. Included microsoft forums and I read the most of articles/forums in net but they didnt work.
I can advice the other users, if you have an outlook (office365, hotmail) account, please dont make an effort with “SMTP option”. Just sign to Gmail (if your company’s doesnt have an official account) and do it via “Gmail option”. Sure, you have to register an “Oauth” authorization on Gmail.