Ask HN – Postini Replacement that displays sender email?

I've seen the news that Postini will integrate into Google apps for over a year now. Been using Postini for some years now.

Postini offers a feature I can't find elsewhere, and I can't tell if it will be a part of the replacement Google offers.

I want to be able to list the filtered email and see the sending email address in plain text. My normal routine is to sort by subject, making it easy to spot the occasional useful msg by subject, and by glancing at the sending email, it's pretty easy to know if it needs a closer look.

I have not found another filter service that displays the plain text email of the sender.

Suggestions?

Apologies if this has been dealt with. Did not find it.