Imapsync

About

imapsync allows you to transfer or synchronize data between any two IMAP servers. This could be used in any of several scenarios:

• Upgrading from one mail server to another (SME -> SME, Exchange -> SME, Notes -> SME)
• Backing up email from one IMAP server to another
• Automated spam learning when using SME with an internal mail server (see the Advanced example below).

Author: Gilles LAMIRAL <lamiral-at-linux-france.org>

• Author's README
• Author's Change Log
• Author's Distribution Folder
• Note about Bugs with perl-Mail-IMAPClient-3.x

Installation

Enable the dag repository

The following command will configure the dag repository on SME Server. EDIT NOT COMPLETE!

To create an entry in the database for the epel repository we open put the following commands in a terminal window or in a shell window:

/sbin/e-smith/db yum_repositories set epel repository \

Name 'SME Server - epel' \
BaseURL 'http://<http://download.fedoraproject.org/pub/epel/7/$basearch' \
EnableGroups yes \
GPGCheck yes \
Visible no \
status disabled

To enable the changes:

    signal-event yum-modify

Just to be sure, give yum a fresh start:

    yum clean all

After adding it to the database we have to update the changes to the configuration file:

signal-event yum-modify

Install imapsync

yum --enablerepo=dag install perl-Mail-IMAPClient-2.2.9 imapsync

IMPORTANT If you install imapsync without specifying perl-Mail-IMAPClient-2.2.9 on the command line as shown above, yum will download and install the latest available version of perl-Mail-IMAPClient - currently 3.x - which does not work according to the author of imapsync. If this happens, you will get an error about IMAPClient every time you run imapsync.

If you have accidentally installed the wrong version of IMAPClient, you can correct the problem using the command below. When done, reinstall imapsync as shown above.

yum remove perl-Mail-IMAPClient

Examples

Basic Example: Account Duplication

This example would copy all existing folders from foo@imap.truc.org to bar@imap.trac.org

/usr/bin/imapsync \
  --host1 imap.truc.org --user1 foo --passfile1 /etc/secret1 \
  --host2 imap.trac.org --user2 bar --passfile2 /etc/secret2

Bear in mind that you would need to create /etc/secret1 and /etc/secret2 containing the correct passwords for imapuser1 and imapuser2 respectively.

Advanced Example: Exchange Public Folders

This example will transfer the public folders 'LearnAsSpam' and 'LearnAsHam' from an Exchange server to the specified user on your SME server.

If you create and schedule a script to run this command regularly, and combine it with LearnAsSpam.pl and Auto-Learning you could let the users on an internal Exchange Server train your SME spamassassin by dragging SPAM or HAM into public folders in their Outlook.

Assumptions:

• For the Exchange Server:
  • the user spamfilter exists on the Exchange server
  • the password for spamfilter on the Exchange server is in the file /root/secret1
  • the Exchange Server user spamfilter has Owner permissions on both Public Folders/LearnAsSpam and Public Folders/LearnAsHam
• For the SME Server
  • the user spamfilter exists
  • the password for spamfilter on the SME server is in /root/secret2
  • the folders LearnAsSpam and LearnAsHam exist in the email root for spamfilter

imapsync command

/usr/bin/imapsync \
-- noauthmd5 \
--host1 a.b.c.d --port1 993 --ssl1 --user1 spamfilter --passfile1 /root/secret1 \
--delete --expunge1 --prefix1 "Public Folders." \
--host2 localhost --port2 993 --ssl2 --user2 spamfilter --passfile2 /root/secret2 \
--folder "Public Folders/LearnAsSpam" \
--folder "Public Folders/LearnAsHam"  \
--noauthmd5 

Migrating users and data to Zarafa

Zarafa migration whitepaper describes various ways of migrating your users and your data to a Zarafa server.

http://download.zarafa.com/zarafa/release/docs/zarafa_migration.en.pdf

Folder Naming

SME and Zarafa use different folder naming. To enhance migration SME folders should be renamed prior to migration.

drafts > Drafts             
sent-mail > Sent Items
trash > Deleted Items
junkmail > Junk E-mail

IMAP migration from SME/IMAP to Zarafa/IMAP

Configure zarafa for migration enabling IMAP on port 8144

Perform a user mail sync from SME/IMAP (host1/port1) to Zarafa/IMAP (host2/port2)

imapsync --noauthmd5 --host1 localhost --port1 143 --split1 500 --user1 <username> --password1 <password> --sep2 / --prefix2 "" --host2 localhost --port2 8144 --split1 500 --user2 <username> --password2 <password>

Example to synchronize a user named 'bob' with password 'bob123' from SME IMAP into Zarafa:

imapsync --noauthmd5 --host1 localhost --port1 143 --split1 500 --user1 bob --password1 bob123 --sep2 / --prefix2 "" --host2 localhost --port2 8144 --split2 500 --user2 bob --password2 bob123

Note: If the synchronization process terminates, apparently successfully, but only part-way through, delete the dovecot.index.cache file in the last folder copied and restart the process. Adding "--useheader 'Message-ID' --skipsize" to the command above will prevent duplicates if the process does have to be restarted.