Allowing incoming mail to gmail account: how?

Hi all,

I have so-net at home, but can’t seem to access the webmail feature. Is there some English language link that will get me there?
My primary e-mail is gmail, and I’m perfectly happy to use that as my primary mail source except that it doesn’t allow mail from certain senders. :fume:. So, I thought that using my so-net webmail would be a way around the spam filter in gmail, but I’d really prefer to stick with my gmail account if I could get it to allow mail.