My email box keeps coming up as full I can’t or send emails

Hi ,

I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.

Besides the provided steps by the Q&A Assist, you can increase storage limits by upgrading your Outlook.com account with a Microsoft 365 subscription. This gives you:

Advanced email security

An ad-free inbox

A 100 GB mailbox per person.

https://support.microsoft.com/en-us/office/storage-limits-in-outlook-com-7ac99134-69e5-4619-ac0b-2d313bba5e9e

If you are receiving a "mailbox is full" warning and cannot send emails, it is likely that your mailbox has reached its storage limit. This can happen even if the mailbox size displayed to you does not reflect the actual size due to the presence of the Recoverable Items folder, which is not visible to users.

To resolve this issue, you can follow these steps:

1. Check your mailbox quotas: Use the following PowerShell cmdlet to verify your mailbox quotas:

      Get-Mailbox ******@contoso.com | fl ProhibitSendReceiveQuota,RecoverableItemsQuota
   

   Then check the status of your mailbox quota with:

      Get-MailboxStatistics ******@contoso.com | fl StorageLimitStatus,TotalItemSize,TotalDeletedItemSize
   

2. Delete unnecessary items: If your mailbox size exceeds the quota, consider deleting items from your mailbox to free up space.
3. Enable archiving: If archiving is not enabled, you can enable it and set up a retention policy to automatically manage your emails.
4. Contact support: If these steps do not resolve the issue, consider reaching out to Microsoft Support for further assistance.

By following these steps, you should be able to manage your mailbox and resolve the "mailbox full" issue.