What is imapsync? (back to menu)


Imapsync presentation by Gilles

Imapsync is an IMAP transfers tool. The purpose of imapsync is to migrate IMAP accounts or to backup IMAP accounts. IMAP is one of the three current standard protocols used to access mailboxes, the two other are POP3 and HTTP with webmails, webmails are often tied to an IMAP server.

Latest imapsync published release 1.977 was written on Monday, 23-Dec-2019 20:18:02 CET

Imapsync software is a command line tool that allows incremental and recursive IMAP transfers from one mailbox to another, both anywhere on the internet or in your local network. Imapsync runs on Windows, Linux, Mac OS X. "Incremental" means you can stop the transfer at any time and restart it later efficiently, without generating duplicates. "Recursive" means the complete folders hierarchy can be copied, all folders, all subfolders etc. "Command line" means it's not a graphical tool, on Windows you have to run imapsync from a batch file. Anyway there is a visual online service, you can try imapsync online at https://i005.lamiral.info/X/

Imapsync can't migrate Contacts and Calendars. Most email systems don't set or get Contacts or Calendars via the IMAP protocol. No way via IMAP, no way via imapsync but it can be done with other tools or via export/import of csv or ics files. Also consider using caldavsynchronizer or asking experts at Sumatra company.

imapsync is not suitable for maintaining a synchronization between two active imap accounts while the user is working on both sides. Use offlineimap (written by John Goerzen) or mbsync (written by Michael R. Elkins) for bidirectionnal (2 ways) synchronizations.

Alternatives to imapsync are listed in the Similar softwares section.

Contact the author, Gilles LAMIRAL (back to menu)

Gilles LAMIRAL
Gilles LAMIRAL
work cel: +33 6 19 22 03 54
work desk: +33 9 51 84 42 42
Postal address:
22 La Billais
BAULON 35580
FRANCE

Good feedback is always welcome!
and bad feedback is very often welcome

It may sounds crazy but I do reply personally to every single email message I receive, so don't hesitate to spend time writing to me about your email problems, you're sure to get my attention and my time.

Buy imapsync and support (back to menu)

Imapsync was the best investment I've ever done.

— Uwe Keim Dec 6 '16 at 12:17

Read some other nice and true testimonials from users.

There is no trial version but I offer 30-day money back guarantee whatever the reason for a refund. Or drop me a gentle email and I will provide you the latest imapsync because, well, you made the effort to contact me.
After downloading imapsync, go to the installation documentation.

Special offer: it's only €120 EUR if you buy imapsync + support at once (instead of 60 + 120 = 180 EUR).

For €120 EUR you will get:

For €60 EUR you will get all the above except imapsync full professional support (the first line).

For €120 EUR independently, you get imapsync full professional support, provided by the imapsync designer and developer, Gilles LAMIRAL, your servitor, who has been supporting imap migrations with imapsync for more than 18 years (I started in 2001). See a detailed support description below.

You may wonder why the support alone is the same price as imapsync+support? it's because when you buy both at once, I'm not sure I will have to spend some time directly with you, it's possible that everything will go smoothly for you; but when you buy the support alone, after buying the software, then I will surely spend time (any amount of hours) to help you. Does it seem fair enough?


Professionals buyers outside France are VAT exempted. Individuals or French buyers are VAT taxed.
it is for accounting and customs declaration.
VAT is often 2 letters followed by several digits, for example mine is FR74429303332.
If you're a European and you don't have a VAT number then select "Software only. For individual use." (it's at the bottom of the buying options, above).

If you can't use Paypal nor a credit card (no Paypal account needed) then consider a Bank transfer. or a Crypto payment.

Instantly at the end of the payment, Paypal will proposed you to go back to the site, via a link to gilles@lamiral.info (it's my paypal account name), this link brings you to imapsync download.
You will also receive an email from gilles@lamiral.info a few minutes later (it can fall in the Spam folder sometimes).
In order to get an accurate invoice, please make sure the delivery postal address you enter in Paypal suits your accounting department, since revised editing is not easy.
Your invoice will be sent within a few days by email. My company is identified by VAT number FR74429303332 or French SIRET number 42930333200051, French APE/NAF number 6201Z ("programmation informatique" in French, aka, computer programming).

Support (back to menu)

For those of you who seek support, contact me, Gilles LAMIRAL, by email or phone:

The support is done in English, mostly by email or possibly phone/skype. Office hours start at 10:00, end at 16:00 UTC, extra time is possible in case of emergency. The support aims at helping you to get your imap migration job done, quickly if possible. Support includes things like no time to read the documentation, how to deal with special imap software servers (Gmail, Office365, Exchange etc.), choosing and explaining options, explaining error messages, solving authentication issues, dealing with speed, quotas, special context, running in parallel, etc., so in summary: anything!

I have been supporting imap migrations with imapsync since 2001, I still enjoy it!

Payment by bank transfer and IBAN (back to menu)

If you can't pay with a credit card via Paypal then it is possible to pay via a bank transfer.

Refund for a bank transfer is far less easy than with Paypal so drop me an email to test imapsync and to be sure it will do what you need it to do, before any payment.
The bank account references will be given upon request.

It will surely add extra work editing manually the invoice, back and forth getting good coordinates, so I will charge both software and support normal prices for a payment via bank transfer, that is 120 EUR.

Payment with crypto currencies, Bitcoins, Ethereum etc. (back to menu)

The funny thing about crypto payments is that I receive very few of them, one or two per year, and in small amount, one or two dollars equivalent... Maybe one day those little crypto coins will be like gold? (I would like that!)

Buy with Crypto, free price.

Facts and figures (back to menu)

The figures presented here do not include the github imapsync release usage. It's because --noreleasecheck is on by default since release 1.592 (2014/05/22) in the github release. Looking at the numbers before and after 2014, the figures showed here could be doubled.

Where all those numbers come from? To know whether a newer imapsync exists or not, imapsync does a http GET to the file VERSION. Via the User-agent parameter it also sends:

You can remove this behavior by adding option --noreleasecheck on the command line (or by setting $releasecheck = 0 in the source code). Check CVE-2013-4279.

How to transfer a single mailbox on Windows (back to menu)

After Imapsync installation, you have to edit a "ready to use" batch file called imapsync_example.bat and run it by a double-click. This batch file is also in the zip archive so it's useless to download it.

I strongly advise you to read and follow the document README_Windows.txt

How to transfer a single mailbox on Linux/Unix (back to menu)

Here after is presented a Linux imapsync command line example. You can try it on a terminal, as is. Anyway, it's easier to edit a shell script with the same exact command and run this script in a terminal or from a graphical desktop. Just take the Bourne shell script example imapsync_example.sh and adapt with your own parameters. This shell script file is also in the tgz archive so it can be useless to download it.

I strongly advise you to read and follow the document TUTORIAL_Unix.

After Imapsync installation, a basic example in a shell terminal is the following:

./imapsync   \
  --host1 test1.lamiral.info  \
  --user1 test1               \
  --password1  "secret1"      \
  --host2 test2.lamiral.info  \
  --user2 test2               \
  --password2  "secret2"

How to transfer many mailboxes (back to menu)

In order to migrate many mailboxes, you should use a loop over a csv file containing only the data credentials.
On Windows, see sync_loop_windows.bat batch example.
On Unix, see sync_loop_unix.sh example.
An example of this csv file is file.txt, it can be used with the two previous command scripts.
All example scripts can be found in the examples/* directory.

I strongly advise you to read also the following FAQ documents:

Installation (back to menu)

Hardware system requirements:

Depending on the system where you'll run imapsync:

After the imapsync installation you should go to the documentation section just below.

Documentation (back to menu)

Windows users, the README_Windows.txt contains essential knowledge to do your first syncs.

Unix users, the TUTORIAL_Unix will teach you smoothly how to do your first syncs. Windows users can read it too.

The README file contains general and specific pieces of information to understand imapsync and succeed in your migration or backup.

The FAQ.d/* files present Frequently Asked Questions (and not so frequently asked ones) and their answers. Here is the main menu:

Tips about imap server softwares:
Solving problems:
Various tips:

The ChangeLog to read what changed in details since 2001.

The TODO file lists what may be coded or done in the future.

All the people I thank are in the CREDITS file.

What you're allowed to do with imapsync is "No limits to do anything with this work and this license." like written in the https://imapsync.lamiral.info/LICENSE file (the detour is worth it).


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This document last modified on Friday March 13, 2020 ($Id: index.shtml,v 1.460 2020/03/13 14:07:10 gilles Exp gilles $)
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