Follow this easy method for transferring all e-mails, including folders, from a single IMAP account to another.

First, let’s git it with “git”:

# git clone https://github.com/imapsync/imapsync

Install dependencies for any Ubuntu flavor. I’m using 20.04:

# sudo apt-get install  \
libauthen-ntlm-perl     \
libclass-load-perl      \
libcrypt-ssleay-perl    \
libdata-uniqid-perl     \
libdigest-hmac-perl     \
libdist-checkconflicts-perl \
libencode-imaputf7-perl     \
libfile-copy-recursive-perl \
libfile-tail-perl       \
libio-compress-perl     \
libio-socket-inet6-perl \
libio-socket-ssl-perl   \
libio-tee-perl          \
libmail-imapclient-perl \
libmodule-scandeps-perl \
libnet-dbus-perl        \
libnet-ssleay-perl      \
libpar-packer-perl      \
libreadonly-perl        \
libregexp-common-perl   \
libsys-meminfo-perl     \
libterm-readkey-perl    \
libtest-fatal-perl      \
libtest-mock-guard-perl \
libtest-mockobject-perl \
libtest-pod-perl        \
libtest-requires-perl   \
libtest-simple-perl     \
libunicode-string-perl  \
liburi-perl             \
libtest-nowarnings-perl \
libtest-deep-perl       \
libtest-warn-perl       \
make                    \
time                    \
cpanminus

Install the following Perl modules:

# sudo cpanm Mail::IMAPClient
# sudo cpanm JSON::WebToken

Next change into the cloned directory and run imapsync with the following syntax:

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