Export your mailbox addresses to CSV

How it works

1. Enter the credentials of the mailbox to scan — address, password (or app password) and IMAP server settings.
2. The export starts right away — no volume to approve, no payment: this tool is free with no strings attached.
3. MailSync reads your message headers — From, To, Cc and the date, folder by folder, without ever downloading a message body.
4. Addresses are grouped together — one row per address, with the most frequent display name, the received/sent counters and the date of your last exchange.
5. Download your CSV file — ready for Excel, LibreOffice or an address-book import; available for 48 hours.

Five columns: address, display name, messages received, messages sent, last exchange. Rows are sorted from the most active correspondent to the least, which puts the people who matter at the top and leaves one-off addresses at the bottom of the file.

Fast by design: because only headers are read, a mailbox with tens of thousands of messages is processed without downloading its gigabytes of content. That's also what lets this tool be free with no volume limit.

Use cases

• Rebuilding a lost address book — your exchange history already holds every real contact you have: the export lays them out, ready to be imported again.
• Taking your contacts along when you change address — before closing a mailbox, get the list of the people you corresponded with, so you can tell them your new address.
• Filtering before an import — the counters tell a regular correspondent from a one-off address at a glance, so you only import what matters.
• Spotting senders worth filtering — an address with hundreds of messages received and none sent is almost always a newsletter or a notification bot.
• Reconnecting after a long gap — the "last exchange" column shows immediately who the conversation stopped with, and how long ago.

What this tool doesn't do

• The export works over IMAP only: mailboxes reachable solely through POP3, or through a closed proprietary Exchange connector, cannot be scanned.
• The tool does not read your address book (CardDAV): it rebuilds the list from your message headers. A contact you saved but never exchanged with will therefore not appear.
• The CSV holds the address and the display name, nothing more: no phone number, no postal address, no photo — that information isn't in message headers.
• Trash, spam and drafts folders are skipped. That's deliberate: counting the senders of your spam would fill the file with throwaway addresses, and a draft was never sent to anyone.
• The file stays downloadable for 48 hours after the export finishes, then it's permanently deleted from our servers.
• On a mailbox with tens of thousands of distinct addresses, the export stops at a cap of 50,000 addresses and tells you so on the tracking page. That cap is the same for everyone.