When receiving email from various sources, my computer adds the word subject into the subject field of the emails. It looks like:

Subject: (Then inside the form field) Subject: Whatever the line reads.

Most of this is generated by spam mail, however, it happens with some of my contacts. When I ask these people if they have typed "subject" into the subject field they say no. I have seen someone send me a normal email and it show up with the double subjects.

I've searched on-line for others with the same problem to no avail. Please help.