My wife has just tried to send 2 emails using OUTLOOK EXPRESS with about 6 recipients each. The first one went ok but now she is getting this error. An unknown error was returned from the SMTP server. Subject 'Fw: Darwin', Account: 'Yahoo', Server: 'smtp.mail.yahoo.co.uk', Protocol: SMTP, Server Response: '521 yahoo.com closing transmission channel. User is over the limit for messages allowed to be sent in a single day.', Port: 25, Secure(SSL): No, Server Error: 521, Error Number: 0x800CCC61 As she has only sent one message today ,why is she getting this message? I use yahoo through OUTLOOK and am having no problem. Could this be a server issue , i have scanned for both spyware and viruses and found nothing.