Since we released our new interface over 3 years ago, the vast majority of users have moved to using it and love the improvements that it has brought.
In a small but regular number of cases however, people are accidentally logging in to the old classic interface when they wanted to log in to the new interface. This tends to cause confusion and unnecessary support tickets.
To make it clearer, we've decided to separate the login screens for the current interface and the classic interface by putting them on separate domains. So from Monday, 23 November 2015 you will only be able to log in to the regular interface at https://www.fastmail.com. To log in to the classic interface, you will have to go to https://classic.fastmail.com.
https://classic.fastmail.com is available immediately, so if you're a
classic interface user, we recommend you go there now, bookmark it and use it going forward.