Commercial emails are rewritten to aid user understanding and usability. A commercial email is identified from a set of email messages received by an email client for a user. The content of the commercial email is analyzed to identify salient facts associated with the terms of a sale specified by the content. A simplified subject line for the commercial email is generated based on the salient facts and used to replace the original subject line. Priority scores can also be computed based on user transaction history, time, or other factors. The priority scores can then be utilized to organize commercial emails. Further, commercial emails can be segmented from other emails, such as personal or work emails.