I’d probably load Thunderbird on the Windows 7 PC, import from WLM.
Then backup Thunderbird, export the settings and mail or just mail (Generally saves to a zip)
On the destination PC, restore Thunderbird from a backup, import the Thunderbird backup that was made on the Win 7 PC
Using the Export Tool:
Open Thunderbird: and go to Tools > Export.
Click "Export": to open a new window where you can choose the location to save your backup file (e.g., Desktop, Documents).
Select the desired location: and filename, then click "Save".
Thunderbird will then export your profile to the specified location.
Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (4th Gen?)
Motherboard
ASUS ROG Maximus VI Formula
Memory
32.0 GB of I forget and the box is in storage.
Graphics Card(s)
Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
Sound Card
Onboard
Monitor(s) Displays
5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Tablet
Screen Resolution
All over the place
Hard Drives
Too many to list.
OS on Samsung 1TB 870 QVO SATA
PSU
Silverstone 1500
Case
NZXT Phantom 820 Full-Tower Case
Cooling
Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
I do not believe there is a way to export EVERYTHING into TB.
I used WLM for many years. After WLM, I used TB for a short time. The only thing I was able to figure out how to export into TB was the address book. All my email accounts I had to set up new in TB. Then I had to option TB the way I wanted. TB has a LOT of options.
Have a look at eMClient, I went from Win7 to Win11 and imported all of my emails from WLM to eMClient Free. I changed from a POP3 Account in WLM to an IMAP account in eMClient and it worked perfectly.
The FREE version allows you to use 2 x emails accounts.
eMClient looks similar to WLM and can be configured to what you like or need.
