Microsoft Knowledge Base Article - 327303
Outlook Express May Stop Working After Receiving a "Mailbox Full" Message
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This article was previously published under Q327303
SYMPTOMS
If you use Outlook Express 6 as an e-mail client with an IMAP mail server, Outlook Express may stop working randomly when the mailbox on the server becomes full. You may receive messages that warn you that your mailbox is full, or you may receive any of the following error messages:
Msimn.exe - Application error:
The Instruction at "0x77f6750b" referenced memory at "0x00000058". The memory could not be read
Your IMAP server wishes to alert you to the following: (100) Your mailbox is full. Delete messages you no longer require
RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Internet Explorer 6 service pack that contains this fix.