In short, write about your experiences in using these products.

Many products have affiliate programs that let you earn percentages by referring other people.

By writing a review or evaluation of these products and including your affiliate link, you provide a service to other people while you create a passive income stream for yourself.

Let's say you have a section on your site devoted to products you are affiliated with.

Don't just enumerate these products and give only short descriptions. Include a summary of your review after each product, then invite your readers to request for complete reviews you've put on autoresponder.

Make them want to request your reviews. It won't work if you say, "Click here to receive full review by e-mail." Try, "Read Top 5 Ways this Product Will Help You in Your Online Promotions!"

So today, why don't you take a look at all e-books, software, services and other products you either paid for or used.

Write a review for each of them and put your reviews on autoresponder. Let your opinions and product reviews on autoresponse be another source of passive income for you!

DigiPortal is effectively acting as a trusted middleman in a process that reminds me of PGP ("Pretty Good Privacy") defacto industry standard e-mail security application that incorporates a similar process via a key held by a trusted third party. You're ostensibly guaranteed never to receive any Spam based e-mail as spammers will never receive your e-mail, let alone reply to it - most use automated systems that have no human intervention in process. It's relatively painless for you to manage new contacts - if you're receiving in-bound e-mails from a new a person (contact) that you have no existing relationship with, it's easy to accept his/her request to reach you and software also automatically updates your permission list.

ChoiceMail is an elegant solution that works well, is easy to use and solves a problem very cost effectively. There are a few hiccups with software - but, these are minor when you consider significant benefits of product and assuming company will broaden its support for other applications in near term. At present DigiPortal only works with standard ISPs such as Earthlink, ATT, etc. and with specific desktop clients including Outlook Express and Eudora - no web-based e-mail services (HotMail or Yahoo mail) work with software yet and there is no support for AOL at present. My biggest complaint is that they don't support a standard Outlook e-mail - you have to manually import your contact list from Outlook, which can be painstaking depending on number of recipients in your address book. And, their initial focus is on small business user or consumer, as they offer no support at present for corporate enterprise.