Rejecting email for mailboxes over quota with 5XX rather than 4XX MailSite can be configured to reject inbound connections for mailboxes that are over quota with a permanent 5XX error. The default is to issue a 4xx error. If a 5XX is issued, the remote hosts sees this as a permanent failure and will should not try again. If a 4XX is issued, this is seen as a temporary error and the sending server should retry later. To reject inbound messages destined for mailboxes that are over their quota limit, follow the stpes below:

1. Open the MailSite Console
2. Click the PLUS symbol
3. Click on the server folder
4. Click on the QUOTAS icon
5. Select the "Reject over-quota mail with permanent (552) err' option.
6. Restart SMTPRA

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