How to Resolve Outlook Error Message ‘Mailbox Size Limit Exceeded’?

Outlook PST file size has exceeded its default size (refer to the table below for PST size limit in different Outlook versions).

You are using an older version of Outlook data file (.ost or.

You’re running Outlook on Exchange server and have set mailbox size limit.

Possible Reasons Behind Exceeded Outlook Mailbox Size Limitįollowing are some situations that may increase Outlook mailbox size beyond its permissible limit:

If your PST file gets corrupt, use Stellar Repair for Outlook to repair the PST file with precision and speed. Also, as PST file exceeds the maximum size limit, the propensity for data corruption increases exponentially. Note: Even if you don’t receive a warning, your Outlook PST file might become so large that it slows down Outlook’s performance. The message is displayed as a warning notification to inform users that they have exceeded the storage limit for their mailbox, i.e., the Outlook mailbox is full. These users will be able to exchange large messages withĮach other, but not with Internet senders and recipients (unauthenticated senders and recipients).It’s common for Outlook users to encounter the error message ‘You have exceeded the size limit on your mailbox’. For example, suppose your organizational message size limit is 10 MB, but you configured the users in your marketing department to send and receive messages up to 50 MB. For messages sent between anonymous senders and recipients (typically, Internet senders or Internet recipients), However, this exemption applies only to messages sent between authenticated senders and recipients (typically, internal senders and recipients). For example, you can allow specific mailboxes to send and receive larger messages than the rest of the organization by configuring custom send and receive limits for those mailboxes. Message size limits for your organization.

Therefore, you can configure specific senders and recipients to exceed the default Recipient limits between authenticated senders and recipients (typically, internal message senders and recipients) are exempt from the organizational message size restrictions. There wasn't much help or guidence on this topic on the technet website.

Exchange 2016 attachment size limit