Thanks for pointing me to this thread Michael.
Rodney, I think you should try Axon. You have full access to all of the downloads on www.OnyakTech.com
I don’t think you should require people to have valid email addresses in order to register on your site. Some people may want to get involved with your site but they may not feel comfortable providing you with their email address.
First you will need a way to capture non-delivery reports of all types and then store those invalid email addresses so that you can prevent any further emails from being sent to them in the future. But you need this handled in a way that is automated and doesn’t directly change the users profile. Handling this manually would be a time consuming task.
Going forward, you may want to leave your site registration unverified and rely on a “double opt-in”. A double opt-in will require email address verification from people who are actually interested in specific newsletters you offer.
Those are all features in Axon. To get started you should run the Axon POP3 Scheduler to process all of the bounce backs you have. Then you can send an email from Axon that will automatically exclude the bounce backs.
For more information about the Opt-IN module for Axon and handling double-opt in, go to http://www.dotnetnukeemail.com/GettingStartedwithAxon/AddOnModules/OptInModule/tabid/383/Default.aspx
For more information about opt-in management with your newsletters, go to http://www.dotnetnukeemail.com/GettingStartedwithAxon/OptInManager/tabid/378/Default.aspx
For screen shots of the non-delivery reports, go to http://www.dotnetnukeemail.com/GettingStartedwithAxon/AxonEmailCampaignReports/tabid/380/Default.aspx
Some other features in Axon you may want to take advantage of is the dynamic processing of the email content and threaded campaigns (a.k.a drip email marketing). The dynamic processing of email content allows you to create one newsletter that people can subscribe to and each time it runs the email content can be specific to that user (show them their current order status, new people who registered on your site that live near them, etc) or display the last 20 forum posts or articles from an RSS Feed. With this feature you create the campaign once and it runs automatically for you at a schedule you define (every week, every day, once a month, etc).
For more information on automatically generating personlized emails, go to http://www.dotnetnukeemail.com/GettingStartedwithAxon/DynamicInserts/tabid/381/Default.aspx
Threaded campaigns are much more advanced than normal campaigns by allowing you to send additional emails based on the users reaction to the last email. A sample use of this type of campaign is to send an automated “Thank You” message to a new customer and then automatically send another email five days later that may offer a special discount to get them to return to your site and buy more of your products. You can keep taking that farther by sending additional emails to that customer if they have read your email but did not yet make another purchase. This allows you to entice your customers to return to your site while not bothering people who didn’t care enough to read your first email.
More information about drip email marketing in Axon is on http://www.dotnetnukeemail.com/GettingStartedwithAxon/ThreadedCRMCampaigns/tabid/382/Default.aspx