May I know what is going on with this email?

From: postmaster [mailto: postmaster@bertschi.com ]
Sent: Wednesday, 29 March 2017 11:08 AM
To: Singh Harjinder
Subject: Undeliverable: Port of Sunlight UK , Unilever Indonesia

The original message was received at Wed, 29 Mar 2017 05:07:42 +0200
from:
< harjinder.singh@bertschi.com >

   ----- The following addresses had permanent fatal errors ----- < yucarry@gianttransporter.com >
    (reason: 552 5.1.1 < yucarry@gianttransporter.com > Mailbox delivery failure policy error) < meryana.mdn@gianttransporter.com >
    (reason: 552 5.1.1 < meryana.mdn@gianttransporter.com > Mailbox delivery failure policy error) < marina.mdn@gianttransporter.com >
    (reason: 552 5.1.1 < marina.mdn@gianttransporter.com > Mailbox delivery failure policy error) < gti@gianttransporter.com >
    (reason: 552 5.1.1 < gti@gianttransporter.com > Mailbox delivery failure policy error)

   ----- Transcript of session follows ----- ... while talking to  mx.zoho.com .:
>>> RCPT To:< gti@gianttransporter.com >
<<< 552 5.1.1 < gti@gianttransporter.com > Mailbox delivery failure policy error
552 5.1.1 < gti@gianttransporter.com > Mailbox delivery failure policy error
>>> RCPT To:< marina.mdn@gianttransporter.com >
<<< 552 5.1.1 < marina.mdn@gianttransporter.com > Mailbox delivery failure policy error
552 5.1.1 < marina.mdn@gianttransporter.com > Mailbox delivery failure policy error
>>> RCPT To:< meryana.mdn@gianttransporter.com >
<<< 552 5.1.1 < meryana.mdn@gianttransporter.com > Mailbox delivery failure policy error
552 5.1.1 < meryana.mdn@gianttransporter.com > Mailbox delivery failure policy error
>>> RCPT To:< yucarry@gianttransporter.com >
<<< 552 5.1.1 < yucarry@gianttransporter.com > Mailbox delivery failure policy error
552 5.1.1 < yucarry@gianttransporter.com > Mailbox delivery failure policy error
>>> DATA
<<< 503 No recipients specified
451 4.4.1 reply: read error from  mx.zoho.com .

Thx

Mery