There are several key differences between TMail and email.

Inline Operations vs Forking Operations

In email, the main operations that can be done on an email are reply, forward and reply-all. We refer to all of these as ‘forking’ operations because they always fork or copy the email. TMail additionally supports inline operations which modify a TMail by adding a comment. EMail has no equivalent of inline operations. Examples of inline operations are Add Comment, Update Section, New Section, Update Sections, etc.

In general with TMail you should favor inline operations over forking operations unless there is a good reason to fork. The main reason to fork is to have a new TMail with a different set of users (writers) from the original TMail.

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The “21” in tmail21 refers to “21st century” as in Mail for the 21st century

At the moment TMail cannot completely replace email. In our experience companies that use TMail, see their email usage drop 90% or greater. In particular automated email notifications (from marketers or automated services) must still be directed to email. We are looking at ways to allow non-spam automated email to be directly sent to TMail.

TMail is a service that preserves what’s good about email, while adding capabilities that makes it vastly more usable and productive than email.