I’ve sent a few emails to other email-ids, neither have they reached nor bounced back to me, why?

This happens; if the remote SMTP is unable to receive emails due to heavy traffic, network congestion, misconfiguration or overwhelming requests or remote SMTP is down for some reason. Creative Web Hosting email server will keep those messages in queue for its next delivery attempt and will bounce it back to you after it fails to deliver them in a fixed amount of time.