If I have understood correctly, you have a .pxResults pagelist and you want to take a specific property from that page list and present all the list property values in the correspondence?
There are a few options
Add a section include to your correspondence template. The included section will define a table with your pagelist as the source. Just configure the table as needed by adding the property as a column (note that the full Pega CSS is not available to generated emails, so it will only be a basic HTML table, you have to add table CSS explicitly to your corr template). You can also use a repeating dynamic layout if needed.
It’s possible to write JSP to define a custom HTML table with a pagelist as a source, using the pega:foreach syntax. Please see this OOTB Section for a basic example:
If you only want to display a single property, you could define a preprocessing data transform to loop through the pxResults list and concatenate the values into a single text property, and then include that property in the corr template. Eg. pxResults(1).Name = David, pxResults(2).Name = John. You could write a data transform to concatenate this into a single text property .NamesForEmail = David, John and then include .NamesForEmail in your Corr. You can use the OOTB function Utilities•pyPropertyCSVFromPageList–(ClipboardProperty,String) for this.