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What are the filesize limits for my Outlook Express Messages & Database files?

April 26, 2017database Express files filesize limits Messages outlook

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What are the filesize limits for my Outlook Express Messages & Database files?

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The Messages and Database files used by Outlook Express 5.x can grow to very large sizes, but they cannot exceed the ceiling enforced by Classic OS which limits any individual file to 2Gb. If either file is approaching this size, then Outlook Express may start to exhibit some very strange behaviour. Before you get to this point, you are advised to perform some housekeeping by compacting the Outlook Express database.