[help]proxy websites

anyone know of any decent proxy website that will help one get past any work ip/url filters?

my friends been bugging me like crazy cuz she cant check her personal email at work because the company she works for filters out mail domains.

I asked her to try vtunnel and btunnel they were just the two i knew off the top of my head but those were blocked as well.

does anyone else here have other sites she could possibly use that may not be blocked by their firewall? unfortunately she has no idea what sort of software/hardware they are using. She is a pharmacist not very computer savvy unfortunately.

thanks in advance