How to protect my ftp account?

Why am I getting Suspicious activity has been detected on your account. To protect your account and our users?

• I am trying to Email some property pictures and job bids to a potential client and I keep getting this: Your message was not sent Suspicious activity has been detected on your account. To protect your account and our users, your message has not been sent. If this error continues, please contact Yahoo! Customer Care for further help. We apologize for the inconvenience. I use this account for my own local personal business. Please help if you can, I have a timeline to get these bids in. Thank you, J.P.

• Answer:

  There is no suspicious activity! This is just one of the latest glitches which has been bothering users since several days. Yahoo staff has been notified and is working on it, but there's no telling when the problem will be solved, sorry... Note: if you have a mobile with internet capabilities, try to use it to get into your account and take care of the mails. At least 2 users reported that they tried this workaround and were lucky. I could not verify this though since I don't own a mobile...:-) You will not get a reply from a Yahoo techie since thousands of users have the same problem. As has been the case in the past: Yahoo often leaves it up to the users to find workarounds until they have the problem fixed...:-(