Emails are listed in a large column that takes up only a fourth of the screen. Nearly all of the menus, apps, and notifications are accessed from a toolbar on the left. There are also links to popular tech blogs such as TechCrunch and Lifehacker. You can also use apps to connect to online services such as Dropbox, Facebook, and Asana. Feature Apps include quick access to contacts, a detailed calendar, and the ability to search attachments. Mailbird also includes several optional apps that provide more functionality or connect to other services. There are plans to add multiple account support in the final release, but for now this is not part of Mailbird's beta. Identities also do not save folders, labels, drafts or sent messages to the secondary accounts, only to the primary account.

However, you have to setup e-mail forwarding within Gmail. Identities allow you to forward several e-mail accounts through a single Gmail account, making it very similar to having multiple accounts. However, you can work around this with the Identities feature. Another downside is that the beta only allows a single Gmail account at once. Mailbird does not support more advanced options such as filters, making it lackluster if you want to perform complex tasks.

The app provides basic Gmail features such as composing emails, and sorting email into folders and labels.

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