Google Authenticator now supported for two-factor authentication

FastMail has long supported various methods of two-factor authentication for additional account security, from generated one-time-passwords, to SMS, to Yubikey. Today we’ve added another method to our stable – the Google Authenticator method, otherwise known as Time-based One Time Passwords (RFC 6238). With this you can use your iOS, Android or almost any other mobile device as your second factor when authenticating, increasing the security on your account without requiring you to carry an additional object around with you.

A Google Authenticator alternative login can be configured in the Alternate Logins section of your account settings screen. If you’re using the official Google clients, then you can use its support for QR codes to make setup super-easy. You can however choose to use any number of other clients that support this authentication mechanism; all will work with our implementation.

Please refer to our Google Authenticator help page for more details.

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Reading pane available

Today we rolled out support for a longstanding feature request we’ve had here at FastMail: a reading pane in our web interface. Displaying the mailbox listing next to the selected conversation means you can go through your email without switching between two different screens, and you can see at a glance what other messages are in your mailbox whilst reading an email. This works particularly well in today’s age of widescreen computers and tablets, making good use of all that horizontal screen space.

You’ll find the option to choose a layout that shows the reading pane in the Settings, as part of the “Theme” group of settings. You’ll also find here an option to hide the sidebar, which is useful on smaller devices where you want to use the space for the reading pane instead. Note, when logging in on an iPad we automatically enable the reading pane and hide the sidebar to make optimal use of the space available.

The reading pane is not available in the classic interface.

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Dropbox integration now available

“Cloud” storage is a big deal these days, and there’s all sorts of great ways to make your files available everywhere. FastMail has had an online file storage facility for years, but there’s other popular services out there too. So recently we started thinking about how we could let you use other file services from inside FastMail.

Dropbox is one of the most popular of these services, and we think they do a great job of making it easy to access your files everywhere, no matter what kind of device you use. That philosophy fits well with what we’re trying to do with FastMail, so it seemed like a natural fit to make the two services work together.

So today we’ve released our Dropbox integration. Now when you attempt to attach a file, you’ll be offered a new option: “Attach From Dropbox”. The first time you use this you’ll be asked to sign in to Dropbox and authorise FastMail, but after that you’ll be able to browse and attach files from Dropbox just as easily as you can from your FastMail file storage. Similarly, you can save attachments from your messages directly to Dropbox.

We think this is pretty great. Now you can do things like save a document to the Dropbox folder on your computer at home, then attach it to an email you write from a friend’s computer. you could save some photos you received in a message to your Dropbox, and then use the Dropbox app on your phone to access and share them, and have them ready for you when you get home without having to do anything else.

Note that at no time does this give Dropbox access to your mail or any data stored by FastMail. All access to your Dropbox is done using a random authentication token that can not be linked back to your FastMail account.

We’re pretty excited about this feature, and hope you like it!

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Fast, full message searching across all folders

We’ve just rolled out a significant improvement to our search infrastructure.

Until now, searching for email in FastMail has been slow and idiosyncratic. Searching for words entered into the search box would only search the To/Cc/From/Subject headers of messages in the current folder. It wouldn’t search the message body content or across multiple folders. While there were options that made both of these possible, they were incredibly slow, making finding the messages you wanted frustrating.

Now though, when you enter words in the search box, we search the To/Cc/From/Subject headers as well as the entire message body content, and we do it across all messages in all folders. Additionally, when searching for a word, we’ll show a snippet of the message content with the search term(s) highlighted in the preview area. We’ll also search for multiple different forms of the word e.g. searching for “condition” will find condition, conditions, conditional, conditionally, etc.

Most importantly, by making sure all this data is indexed, the searches are very fast, even with a million messages across dozens of folders. In most cases, it should only take a few seconds to search all your email and we have plans in progress that should speed this up even more over the coming months.

We’ve also built an easy to access advanced search builder. When you click in the search box, an auto-complete popup will appear as you type. The final item in the pop-up is an “Advanced search” option. Clicking on this will show an overlay that lets you construct an advanced search without having to leave the screen.

If you find yourself repeating the same search frequently, you can save it by clicking the “Save” button next to the search in the sidebar. The search will appear with your list of folders. Keyboard power users can quickly select the search using the “g” shortcut folder finder, just like a normal folder.

Note: The new search currently only works with the new (AJAX) interface. If you’re using the “classic” interface or the mobile interface, you’ll get the old search system for now. We hope to fix this in the future. Also if you want the old search behaviour (including sub-string matching), use the substr:(sometext) operator as described on the help page.

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New domains added

We’ve recently added some new domains to Fastmail. You can use these domains to signup new accounts, or as alias email addresses in existing accounts (if your account level supports aliases). The domains are:

  • fastmail.im
  • fastmail.mx
  • fastmail.se
  • fastmail.tw
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Intermittent bayes db corruption resolved

This is a technical post that describes the history and recent efforts to track down a bug that was corrupting some users bayes databases. Fastmail users subscribed to receive email updates from the Fastmail blog can ignore this post if they are not interested.

Over the past few years, we’ve had sporadic reports of users bayes databases being corrupted and reset back to empty. When this happened, it would cause email delivery for that user to fall back to using the global bayes database, which decreased the overall accuracy of their spam detection until they retrained the database with more spam and non-spam messages.

I had tried multiple times to track down what was causing this issue, but each time with no luck. Each time the problem occurred, there was an error message in the logs of this form.

bayes: bayes db version 0 is not able to be used, aborting!

Often searching the internet for an error message will find other people that have had the same problem and tracked down the solution, but in this case it didn’t. Each time I tried to work through the code to see what was going wrong, I reached a dead end and couldn’t see any obvious problem.

Since the corruptions were very intermittent and losing a bayes database isn’t critical, doesn’t cause email to be lost or inaccessible, and can be rebuilt just by reporting email as spam/non-spam again, tracking this down was always a bit of a lower priority issue.

Recently though, after one more corruption report too many, I decided once and for all to track down what was causing it. Bit by bit over the course of several weeks, I added more and more logging information to the server code to track down where in the code the problem was occurring.

The logging results proved to be very odd. In the vast majority of cases it showed that writing to a particular database worked fine, but every now and then, it caused data to be lost. Eventually I managed to create a reproducible test case. It turned out to be very odd issue because performing a particular programming action with a database library worked fine the first 5 or 6 times, but on the 6th or 7th, it would cause data to become lost. Clearly something odd is happening in the lower level library code.

Fortunately there was a straight forward workaround to the problem, so I’ve now patched our code with the workaround, and over the last few weeks I’ve monitored the logs which show the original error message above has completely disappeared and no databases are being corrupted any more.

I’ve reported bugs to the underlying modules causing the problems, so hopefully long term they’ll fixed as well.

https://rt.cpan.org/Public/Bug/Display.html?id=83060

https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6901

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Update to DNS hosting

We’ve rolled out a change to our DNS hosting abilities to switch our backend from tinydns to powerdns. We’d previously tried this change once before but had some problems and had to roll back. After some more development work and testing, we believe we’ve fixed all these issues and so have moved forward to powerdns again.

This change should initially be invisible to users and things should continue to work as they were. In the long term, it will allow us to support more features and faster updates to DNS in the future.

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