OmniMessaging Functional Description 8.3

OmniMessaging Functional Description
07/22/04 Opsol Integrators Inc. Confidential and Proprietary Page 36 of 68
11.2 Configurable Limits
11.2.1 Max Mailbox Size
Max Mailbox Size limits are configurable at the following levels which are listed
in order of usage, i.e. if the Mailbox Root level value is specified then it is used,
otherwise the Service Package level value is used, and so on:-
• Mailbox Root
• Service Package
• System
Within an IMAP session, if an Append or Copy command causes the mailbox
size limit to be exceeded, then the mail will not be delivered to the targeted
mailbox and a NO response will be returned indicating to the user that the size
limit has been exceeded.
If a mail arrives via an SMTP session, which causes the target mailbox size limit
to be exceeded, then the mail will not be delivered to the recipient, but instead
an NDR “Mailbox Full” mail is returned to the sender. Also, periodically, mail
received by a full mailbox will cause a warning mail to be delivered to the
recipient mailbox indicating the mailbox is full. The minimum interval between
warnings generated in this way is equal to a configurable time interval
(WARN_MAIL_SEND_INTERVAL system parameter).
It is possible to set the limits at each level to indicate no limit.
The mailbox size for mailbox size limit checking is calculated as the total of the
size of all mailboxes below a root mailbox.
11.2.2 Mailbox Size Threshold Warnings
Mailbox Size Thresholds are configurable at the following levels which are listed
in order of usage, i.e. if the Mailbox Root level value is specified then it is used,
otherwise the Service Package level value is used, and so on:-
• Mailbox Root
• Service Package
• System
The Mailbox Size Threshold parameter holds a percentage value. The
Threshold size is calculated using this percentage and the Max Mailbox Size.
The total size of all mailboxes below a root mailbox is compared against the
calculated threshold size.
Within an IMAP session, if an Append or Copy command causes a mailbox size
threshold to be exceeded, then the mail will be successfully delivered to the
mailbox but the OK response will warn the user that the threshold has been
exceeded and will indicate the percentage full.
If a mail arrives via an SMTP session, which causes the target mailbox size
threshold to be exceeded, then the mail is delivered successfully. However,