When you install Mailspring for the first time, you’ll be invited to create a Mailspring ID. Your Mailspring ID is separate from your email account(s) and you can use any email address or password you’d like. A Mailspring ID is optional — you can skip this step and use Mailspring as a plain email client — but it’s required for the features below.

Your Mailspring ID allows you to manage your Mailspring subscription. You can have as many mailboxes and email addresses as you like within Mailspring, but your Mailspring ID allows our team to keep track of your subscription and address your support requests. In the future, your Mailspring ID will be your common identity across Mailspring products.

Creating a Mailspring ID is necessary because existing email protocols like IMAP and SMTP do not provide a way to associate metadata with email messages. For example, to snooze an email on your laptop and unsnooze it on your work computer, Mailspring needs to be able to store the date you’ve selected on it’s own and sync it between your devices.

Mailspring does not store your email passwords in the cloud. It syncs only the minimal amount of data required to power features like snooze, send later, etc., and uses a hashing mechanism to identify emails and associate it’s metadata across installs.

If you upgrade to Mailspring Pro, you pro subscription is attached to your Mailspring ID and you can access Pro features on any computer signed in to your account. No serial numbers required!

What needs a Mailspring ID?

Features that store metadata in the cloud — snooze, send later, reminders, read receipts and link tracking, contact profiles, translation, thread sharing, and templates — need a Mailspring ID so that data can be associated with your account and synced between your computers. Reading, sending, searching, and organizing mail works without one.

What if I change my mind?

If you create a Mailspring ID and later decide you don’t want one, you can sign in to the Mailspring ID dashboard (https://id.getmailspring.com) at any time and permanently delete your account and all data associated with it.

Where are the privacy policy / terms of service?

Privacy Policy: Mailspring Privacy Policy
Terms of Service: Mailspring Terms of Service

See also, Mailspring Without Mailspring ID