Word is adding a horizontal line automatically and I cannot delete

[Debbie]

I am using cut/paste to keep a Word document as a journal of an ongoing email
converstation. Word is adding some kind of separator line at the beginning
or at the end of text that I paste. I cannot delete the line at all.

 

[Herb Tyson [MVP]]

It's very likely border formatting. Select the paragraph adjacent to the
line and choose Format - Borders and Shading - Borders tab, and click None.