How to Show Message Sizes in the Mac OS X Mail Mailbox List

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Get information about emails' sizes directly in the macOS Mail message list.

See the Big Ones

Most email messages are small (some have a reported size of 0 bytes), but there are exceptions. To spot these exceptions at once when you look at a mailbox in Apple's Mac OS X Mail, you can include the message size in the list of displayed message attributes.

Show Message Sizes in the Mac OS X Mail Mailbox List

To display the message size in the Mac OS X Mail message list:

  • Select View | Message Attributes | Size or View | Columns | Size from the menu in Mac OS X Mail.

To turn the display of message sizes off again, select the same menu item again.

(Updated August 2016, tested with OS X Mail 6 and OS X Mail 9)

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