We have found one software suitable in our database for this conversion.
fol to eml conversion is most likely used for the purpose of recovery of email messages from old Windows Mail folder files. This might be a little more difficult now, considering that Outlook replaced Windows Mail. Still you might be able to find utilities used to recover or mail files.
Updated: August 3, 2023
FOL
Files with fol extension can be found as specific user folder settings files for Microsoft Windows Mail e-mail client for Windows operating system.
EML
An eml file extension is used by various e-mail clients, such as Microsoft Outlook, Windows' default mail client, Thunderbird, etc. An eml file contains saved email messages either meant as backup or for sharing.