I am using Mozilla Thunderbird as my primary email client and need to save some important emails as PDF files for record-keeping and sharing purposes. These emails include attachments, images, and proper formatting that I do not want to lose. I tried using the print option, but it becomes difficult when I need to convert multiple emails at once. Also, some PDFs do not retain the original layout correctly. Is there a reliable and easy way to save or convert Thunderbird emails to PDF format in bulk while preserving the email content, attachments, and formatting?