Use the offline feature which let users to use email functionality even without internet connectivity. Read/Send emails without internet connectivity, email client will handle and notify the status of the connection.
Use the easiness of the self configuration features, let users to configure the SMTP/IMAP configuration automatically. Work for most of the email service providers with precise settings.
several modules are integrate to mail client to enhance the capabilities and improve the usability. Use the contact modules and more modules coming up which can pluggable to client.
Use the Firefox extension for Unhosted mail client to provide Connectivity support for mail servers. It communicate with mail servers using standard protocols with provided security mechanisms.
Chrome app provide the capability to communicate with email servers to communicate. It also support standard protocols and security mechanism
Users can add more than one mail accounts to mail client and wok with them simultaneously. For that new inbox view helps to easily move from one to another.