HI Pavlina,So, this is how emails work.There is a module called MTA that
spawns MTA childs in order to send our emails.Mta child trying to
deliver your email to say Recipient X, with email as myemail@xyz.com,
will actually contact xyz domains ISP and say to it, I want to deliver
an email to myemail@xyz.com.As soon as ISP confirms that email has been
delivered we mark the email as Sent on our side.Now, it has happened
that ISP gives us a confirmation but doesn't deliver the email.MTA child
when r...