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554 5.2.3 MailPolicy violation Error delivering to mailboxes 

[web-support@<redacted>.com] 

web-support@<redacted>.com 2017-01-11 07:37:00 Infinite IncomingMailbox size exceeds limit 
web-support@<redacted>.com 2017-01-11 07:37:00 Infinite OutgoingMailbox size exceeds limit 

I cannot fix it because it is a group and should not have a mailbox. Any help would be appreciated, thanks