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Convert a PST file to .eml files on Windows

5 October 2026 · searched as convert pst to eml

A PST locks your mail inside one Outlook file. MailCode for Windows turns it into one .eml file per message, in folders that mirror the PST’s own — files any mail app opens — and keeps them searchable at the same time.

How to do it

Choose File ▸ Import PST… and Add files… to pick the PST.
Name the archive folder, and leave Keep the PST's folder structure ticked.
Leave Store messages as .eml files (recommended) ticked, and under .eml folder click Choose… to pick where the files go.
Click Import →. Each message becomes DDMMYYYY_Subject.eml — the date it arrived, then its subject — under folders named like the PST’s.

MailCode: Import PST… with “Store messages as .eml files” ticked. — Import PST… with “Store messages as .eml files” ticked.

A folder with more than 4,000 messages is split into a folder per year, so Explorer can open it. The search index stays in MailCode, which reads each message from its file — keep the folder connected. Two messages with the same date and subject get (2), (3). The Mac App Store version keeps these files inside its own storage, so to hand .eml files to another app there, select messages and use Save N as EML….

MailCode is a mail client for Mac and Windows that keeps your mail in a searchable archive on your own disk. Free for 14 days.

Mac App Store Download for Windows