OS X: Rebuilding Mailboxes (And Why You Might Want To)

| TMO Quick Tip

OS X’s Mail program has a built-in way to help resolve issues with garbled messages or with emails not appearing when you search for them. This option is available under the Mailbox menu—it’s at the bottom, labeled “Rebuild.”

If you pick any mailbox from the sidebar and then choose that, Mail will attempt to, well, rebuild the mailbox, which can help with all sorts of display problems and emails that seem to be missing.

Note that if the mailbox in question has a ton of messages, this process can take a while. You can monitor the progress by choosing Window > Activity from the menus at the top.

And one more thing, as Apple notes in their support article on the topic:

When you rebuild mailboxes for IMAP or Exchange accounts, messages and attachments stored on your computer are discarded, and then downloaded again from the mail server to your Mac. Your mailbox appears empty until the download is complete.

I’ve also found that you may have to select a different mailbox and then click back on the one that’s rebuilt to see that mailbox’s content after the process is complete, or you can quit Mail and reopen it to do the same thing. But after that, you should see a new and improved version of the misbehaving mailbox. If the issue still isn’t resolved, though, be sure to check out my tip from 2014 on solving Mail searching problems. You’ll have to adjust the steps a bit if you’re running a newer version of the operating system, though; where I give the path as “~/Library/Mail/V2/MailData” toward the end of the article, you’ll want to change that to “~/Library/Mail/V3/MailData.” Silly Apple, changing things up and making my old tips obsolete. 

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The logic of putting periods inside quotes has always escaped me, yes I know it’s the rule. But in this case the period really belongs outside the quote so it doesn’t become part of the path:


@fudfud I researched that some time ago.  The period was put inside the quotation marks by typesetters because in the first printing machines, small types at the end of a sentence tended to break off.  So at the end of a sentence, the small period type was put to the left of the larger close quotation mark.  Once this durability problem was fixed, the Brits went back to the logical rule for placing the period (or full stop as they call it):  inside if quoting a sentence, outside if quoting a phrase.  In the US, we were too lazy to change our ways.  So there you have it, your useless piece of knowledge for the day.


Ah, so! Why can’t we just follow the logical style of the British? Who are the enforcers?

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