Today we launched a new feature called Email Subscriptions. You can create an unlimited number of email subscriptions. Each subscription is like a normal subscription in your My Blogs page, except that each one has a unique Bloglines email address associated with it. When email is sent to one of these email addresses, it shows up in your My Blogs page. Emails are not viewable by other Bloglines users, and when you unsubscribe from an email subscription, the associated email address becomes invalid.
Email subscriptions are great for announce-only or broadcast mailing lists that don't provide RSS feeds. They are also useful as temporary email addresses.