Veritas Backup Exec Error while backing up Excahnge 2000 Server

This is a recurring error i’ve been trying to remove from my Exchange 2000 backups using Veritas Backup Exec.
It appears that the email causing it is spam and i’ve been unsuccessful in locating and removing it.

Any help and advice would be most welcome.
Below is the exact error from the log.

Backup – \\SERVER\Microsoft Exchange Mailboxes WARNING: “\\SERVER\Microsoft Exchange Mailboxes\partner [partner]Top of Information StoreInboxŒ〰〰〰〰愱㔸戸㐷㙥㜴捥㤴㝡慥㈰攷昹㠰㌸搸㜰〰㔱㔳㘸㄰搷㘰ㄴ㤴昸戵㈸昷㐷㘲晡捣〰〰〰㌶㑥㘷〰〰㔱㔳㘸㄰搷㘰ㄴ㤴昸戵㈸昷㐷㘲晡捣〰〰〰攸晦㝥〰〰Re:” is a corrupt file.
This file cannot verify.

WARNING: “\\SERVER\Microsoft Exchange Mailboxes\partner [partner]Top of Information StoreInboxŒ〰〰〰〰愱㔸戸㐷㙥㜴捥㤴㝡慥㈰攷昹㠰㌸搸㜰〰㔱㔳㘸㄰搷㘰ㄴ㤴昸戵㈸昷㐷㘲晡捣〰〰〰㌶㑥㘷〰〰㔱㔳㘸㄰搷㘰ㄴ㤴昸戵㈸昷㐷㘲晡捣〰〰〰昸〰㠷〰〰Re:” is a corrupt file.
This file cannot verify.

Verify – \\SERVER\Microsoft Exchange Mailboxes
WARNING: “Re:” is a corrupt file.
This file cannot verify.
WARNING: “Re:” is a corrupt file.
This file cannot verify.