Big website sending lots of email

hi
you can use sender verification so before an email send, your server check exictence of that email. so invalid email not send.

 

Are Yahoo and other email hosters actually blocking your emails or just treating them as spam, i.e., sending them to their users' spam folders?

If they're just treating them as spam, you can add a message to your web page explaining the problem and suggesting that people 1) check their spam folders and/or 2) add your "from" email address to their address books. People have seen these kinds of requests often and many of them will understand.

With Yahoo you can also inquire about Yahoo's program for certifying a sender as legitimate. I haven't used it and, unfortunately, some spammers have, but Yahoo does have a way for you to get on their white list.

Alan