Have you been in the situation where you needed to move everyone’s mail from one provider to another?  It’s a pain to do using the mail client one at a time, but with this guide, you’ll be able to create a csv with everyone’s info and run one command to fire it all off.  All you need is a Linux machine to do it.

First, you’ll need to install the epel repo (skip if you already have it):

CentOS 5 (as root):

CentOS 6 (as root):

Now, use yum to install imapsync. It will automagically install all of the deps.

Now that it’s installed, let’s print out the help file and take a look at all of the usefulness of imapsync:

host1 - source  host2 destination

/bin/imapsync --host1 192.168.0.2  --user1 This email address is being protected from spambots. You need JavaScript enabled to view it. --password1 1raja23 --host2 192.168.0.3 --user2 This email address is being protected from spambots. You need JavaScript enabled to view it. --password2 1raja23

Script for migration all mail from host1 to host2 with imap bulky.

# cat /scripts/imapsync.sh

##############start#######

    #!/bin/bash

    logfile="sinklog.txt"

    host1=192.168.0.2    # host1 is Source

    host2=192.168.0.3    # host2 is Dest

    domain=test.com           # domain is where email account is

                             # everything after @ symbol

    ###### Do not modify past here ######

    date=`date +%X_-_%x`

    echo "" >> $logfile

    echo "------------------------------------" >> $logfile

    echo "IMAPSync started..  $date" >> $logfile

    echo "" >> $logfile

    { while IFS=';' read  u1 p1; do

            user=$u1"@"$domain

            echo "Syncing User $user"

            date=`date +%X_-_%x`

            echo "Start Syncing User $u1"

            echo "Starting $u1 $date" >> $logfile

    #echo "imapsync --nosyncacls --syncinternaldates --host1  $host1 --user1 $user --password1 \

    #$p1 --host2 $host2 --user2 $user --password2 $p1"

    imapsync --nosyncacls --syncinternaldates --host1  $host1 --user1 $user --password1 $p1 --host2 $host2 --user2 $user --password2 $p1

            date=`date +%X_-_%x`

            echo "User $user done"

            echo "Finished $user $date" >> $logfile

            echo "" >> $logfile

            done ; } < userlist.txt

    date=`date +%X_-_%x`

    echo "" >> $logfile

    echo "IMAPSync Finished..  $date" >> $logfile

    echo "------------------------------------" >> $logfile

####end#####

2. userlist.txt file should be like with with username and password

cat /home/satya/migration_list_test.csv |awk -F',' '{print $1";"$3}'

    user;password
    user2;password2