Yandex Mail Outgoing Problem

We are facing problem in setting up Email Inbox . Tried with many email services like Zoho Mail, Bluehost but failed.

With Yandex , we got half succeeded. Now Incoming is working , ERPNext is able to pull incoming mails from Yandex , but the problem is with Outgoing Mails. When I send a mail through ERPnext , it goes to sent folder, status shown as sent , but not receiving at recipient end.

could you post your settings? on both Yandex and ERPNext