valerie wrote: I have dedicated servers but still, it's a big problem with bounce backs. Not all, but most yahoo and hotmail addresses bounce. The longer you have the domain, when sending receiving emails thru it on the servers, the more it tends to block you. One would think it would be opposite, but nope.
Yahoo and the like, use robots that "learn" what is spam and what is not and add the spam addresses and/or domains to a list. They also use "blacklists" to prevent some servers from even connecting to their servers. Getting on those lists is easy. Getting off the lists isn't so easy. Some allow you a bit of control of what is blocked and what is not.
One way the robots "learn" is by the amount of email received or sent. If your email address is sending or receiving a lot of emails, that indicates to the bots that you might be a spam source (mass email address). Some services limit the amount of email that can be sent/received at one time. The activity of the account and changes by the administrators of the service affect the blocking, bouncing and such more than the time one has had the domain or account.
My email is an sbcglobal.net account. It is the one I started with when I first got internet access around 1995. I know that a lot of the emails to me are filtered. I also know when a new batch of spammers have bought domains for spam use since my inbox starts showing new messages trying to get me to send poor Mrs. Humperdink James my information because she wants to give me her late husband's fortune and other things.
I have learned how to use the options to manage my mail. I know that I can't have full control, but my advice to all is to learn how your chosen email service works, what you can control and what you can not.