Always subscribe yourself to your own newsletter so that you see it exactly as others see it. This way, you'll detect formatting and delivery problems immediately. You can send out sample newsletters on request. Maintaining your list During normal operation, the mailing list service takes care of most of the maintenance - adding subscribers, removing subscribers and distributing your newsletter. Perhaps the subscriber used the wrong e-mail address when subscribing, has cancelled their Internet account, or has been suspended.
Some messages bounce immediately, others take days.
To save time, file the bounce messages as they arrive and unsubscribe them all in a bunch just before sending out the next issue of your newsletter. How it's fundamentally different from a printed newsletter, how to promote it on the Internet, how to promote it elsewhere, and how to avoid offending potential readers when promoting it.