Step 1:fire up the Outlook app and click theFilemenu in the top left corner.

Step 2:In theInfotab, clickTools > Mailbox Cleanup.

Step 3:Select theFind items older thanoption and enter the value in days in the textbox.

Outlook File Menu

Step 4:PressCtrl + Akeyboard shortcut to select all the old emails.

Then, press theDeletekey on your keyboard to delete them.

This behavior can cause Outlook to display the Mailbox Full error even after deleting everything.

Mailbox Cleanup in Outlook

Step 2:SelectOptionsfrom the left pane.

Step 3:Switch to theAdvancedtab and clear theEmpty Deleted Items folders when exiting Outlookcheckbox.

Heres how you’ve got the option to go about it.

Find Old Emails in Outlook

Step 1:fire up the Outlook app on your PC.

Right-tap on theSearch Foldersentry in the left pane and chooseNew Search Folder.

Step 2:Under Organizing Mail, selectLarge mailand specify the minimum email size in the box.

Delete Old Emails in Outlook

Step 3:Hold theCtrlkey on your keyboard and go for the unwanted emails.

Then, click theDeletebutton at the top.

Heres how to set it up.

Outlook Options

Step 1:bring up the Outlook app on your PC and go toFile > Options.

Step 2:In the Outlook Options window, switch to theAdvancedtab and click theAutoArchive Settingsbutton.

Step 4:Use the checkboxes to specify how Outlook should handle old items during AutoArchive.

Configure Outlook to Empty Deleted Items on Restart

Step 5:Enter the age of the items you want to archive and then clickOK.

To avoid this, you might secure your attachments outside of Outlook.

Step 1:Launch the Outlook app and bring up the email containing the attachment you want to save.

Search New Folder in Outlook

snag the arrow next to your attachment and selectSave As.

Step 2:Select your preferred location for saving the attachment and clickSave.

you’re free to then safely delete the email containing the attachment.

Find Large Emails in Outlook

you could try doing this to keep your Outlook from getting full.

Step 1:kick off the Outlook app on your PC and click theFilemenu at the top-left corner.

Step 2:In theInfotab, click onAccount Settingsand selectAccount Settingsfrom the resulting menu.

Delete Large Emails in Outlook

Step 3:Under the Data Files tab, select Outlook Data File and click onSettings.

Step 4:Click theCompact Nowbutton.

Wait for Outlook to reduce the data file size and then test whether the error still appears.

AutoArchiving Settings in Outlook

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