I can't use the mail server at urielw.com for addressing an email to many people because it's not permitted by the webhosting service I use.

I can't use Tsinghua's email server because it does not work properly when sending to many people.

That's why I use a yahoo.

I'd like to send messages via yahoo but indicate uw@urielw.com as the return address -- but I can't do that either; yahoo won't let me.

Sorry for the inconvenience.