Grid/Table Not Showing Correctly in Custom Offer Letter Email

Summary

Custom Offer Letter Email Grids Not Showing Correctly When Emailed to Candidate in PDF

Content

We have a few custom Offer Letters that go out to the Candidate in a PDF. In one of the customer letters I created a grid/table with headers which the Recruiter can edit before they click send offer. The template looks fine when the Recruiter views it, but when the Candidate receives it in a PDF format the grid/table shows in bold whereas in the template it does not. When creating the grid/table I do not have an option to create as a single border. It defaults to the below which looks correct in the template. Is there a way