Where was management in all this? If I ran a company, I would make damned sure people didn't forward chain e-mails through the company's mail system.
You should have gone to HR and told them you felt the woman's e-mails were creating a hostile work environment: hostile to your brain.
It was a small company. The woman sending the e-mail was the comptroller, and the closest thing to HR the company had. She was also one of the owner's drinking buddies, and had been for years. She once tried to get me fired for "incompetence" because her Windows 98 machine kept crashing when the Windows machines at her husband's accounting firm were rock solid. I got to explain to the owner the difference between Windows 98 and Windows NT. HE got it, which saved my job and earned her an upgrade to Windows NT. She never got the difference, insisting "Windows is Windows". When her computer stopped crashing after I switched her to NT, she started telling everyone that the "only way he could fix my computer was by breaking the speakers." There were no NT drivers for her sound card, and the generic ones didn't work. This, was, of course, due entirely to my incompetence.
Did I mention her father was Jewish, she was deeply ant-Semitic, was ALWAYS saying how evil and cheap Jews were, yet insisted she wasn't racist because "My Father's a Kike, and I eat matza and butter all the time! I KNOW Jews because I grew up with one."
It takes a special kind of clueless to use a vile racial slur in the same sentence in which you insist you aren't racist.