Track Replies not working

[Siv]

I have created mailing with Track Replies and Forward Replies enabled and recipient getting mail with random email ID as reply to email ID and recipient  can reply to that mail ID but not able to find where the reply going. As per the document

'Recipients' replies are sent to a CiviMail specific address instead of the sender's address so they can be stored within CiviCRM.

what it means CiviMail specific address and where it's getting stored in CiviCRM also Replies not forwarded to the From Email as mentioned below,

If a recipient replies to this mailing, forward the reply to the FROM Email address specified for the mailing.

Can some one clarify this?