Do you mean SMTP? Server info for Yahoo is:Incoming Mail- pop.mail.yahoo.com Outgoing Mail- smtp.mail.yahoo.comThese settings will ONLY work if you have Mail Plus (not free email)- POP access is only available to paying customers. To get that if you don't have it, go to your Yahoo mail homepage and click options. From there, you should be able to choose POP and forwarding, which will tell you how to upgrade.