If the goal is clean PST to EML conversion without breaking attachments or email formatting, a dedicated utility is the better route. I checked a few options, and TrustVare PST to EML Converter looks practical because it exports PST emails to EML along with attachments, keeps the original folder structure, and does not require Outlook to be installed. It also gives a preview before conversion, which helps when you want to verify mailbox content first. Another useful part is that it supports adding single as well as multiple PST files, so it works for both personal and bulk conversion tasks. There is also a filter option for selective export, which is useful when you do not want to move the entire mailbox. For anyone trying to open Outlook emails in Thunderbird, Windows Live Mail, Apple Mail, or other EML-supported clients, this seems like a direct and simple solution.