Upgraded from original iPhone to 3G S Copied email settings to new device - MobileMe, Gmail, Hotmail and a POP account. All work fine except the latter - receives mail, but when sending / replying, I get error message: Cannot Send Mail The sever rejected one of the recipient's addresses. The message has been placed in your Outbox The recipient address is valid! Outgoing Mail Server settings are:auth.smtp.domain.co.uk. All SMTP servers are toggled to "on". Domain provider told me to toggle SSL to "off". Server port is 587. Password is checked. Why did it work ok on 1st generation iPhone, but not on 3GS?