Is it possible to block senders on iPad2?

I am being deluged with spam which is delivered to my inbox rather than my junk folder
and I need to stop it. I thought that by adding the sender to my contacts list, I would then be able to block them from there, but I am stuck.

I have also tried blocking using Outlook on my PC, but I am not sure that this is working.

Does anyone out there have any ideas, please?

Ian J

Who is the email account with?

I imagine that it is part of the Safari set-up, but otherwise it's Yahoo.