This app for Apple Mail in Mac OS X (available from the Apple App store) lets you quickly file emails in mailboxes with keyboard shortcuts. I have a large hierarchy of mailboxes in 7 email accounts (Gmail and generic IMAP) so for me, this is a huge time saver. I’ve used it to file 374 messages in just the last few days.

It also does other things like let you open mailboxes with shortcuts, and create new mailboxes on the fly. Nice added bonuses. The developer is also very responsive and friendly.

While I’m giving it a 5-star rating I hope the developer fixes two bugs: (1) the “recents” feature doesn’t work when restricting mailboxes to the current account. Still, in actual use, I don’t notice that not working so much. (2) The other bug is more annoying – an error message that pops up when creating a nested mailbox. That one I really hope he fixes!

Basically finding and filing in mailboxes works very well, and is extremely fast.

I had been a Mail Act-On user, but it stopped working with Yosemite for the case where you have a Japanese keyboard installed. I love Indev too. They are really nice and responsive. But they indicated they cannot fix that bug and refunded my money. If you are not using foreign language keyboards their software is also great. More expensive, but very nice and more features unrelated to filing messages.

However, I had been using Mail Act-On just for the filing shortcuts and it was no longer working. MsgFiler has no problems in finding English and Japanese mailboxes.

One note: Some people might think $10 is a high price for an app which “just files.” That was my original reaction too, and I was hesitant about trying it. But I contacted the developer, asked a few questions, he responded quickly and pointed me to a deprecated plugin version I could test with first. I was hooked and purchased right away. If you haven’t tried filing mails with a couple of keystrokes you probably don’t yet appreciate how much of a time-saver this is over drag-and-drop, or going through the hierarchical menu (as we must in iOS), or even using the clumsy CMD+Shift+? keyboard shortcut available in Mail for moving messages.

If you have a large hierarchy of mailboxes, and/or multiple email accounts,  this is definitely a huge time saver.

So for heavy Mail users I would say it is worth it. And I hope the developer updates it soon with those couple of needed fixes.