Have you changed your email address lately?
Did you notify those whose lists you belong to?
I manage a network of Virtual Assistants and periodically I’ll send out an email to the list and get many bounce backs. There is considerable time spent tracking down each individual, either ringing or faxing them, or finding an alternative email address so I can let them know the important piece of information I was trying to get to them.
When you change your email address you need to ensure that you do update it where it’s important. Just as you would when you change mailing addresses for your home.
You could elect to forward the old address to the new one for a period of time till you are sure everyone is up to date.
However, if you belong to several newsletter and forum lists then it is up to you to manually do the change and not expect the newsletter owner or forum moderator to do this. There are usually links at the bottom of newsletters or forum discussions that will allow you to make that change yourself.
Remember, if you want to keep up to date with things and not miss out on the things you signed up for, you need to make sure your address is up to date and not inactive.