i have test a migration from ispcp 1.0.7 to i-mscp 184.108.40.206 (a copy of production server)
with dovecot and apache-itk options : it's work fine
i have test 2 install from sctrach of i-smcp 220.127.116.11 and works too.
i wiil be test a migration from 1.0.7 to i-mscp 18.104.22.168 and update to 22.214.171.124, wait and see.
good job i-mscp team, i love apache itk.