Recently did a disaster recovery test with TKLBAM on a live site with over 6000 subscribers (6053 to be exact). All went swimmingly using TKLBAM restore and also performing a Joomla backup with Akeeba, FTPing the backup to a new server, unzipping, installing and moving the elastic IP to the new server - more than one way to skin a cat and very reliable so far.
One issue I had when my client tried to send a newsletter was that postfic appeared to be broken. Joomla informed me the emails were sent but they clearly were not. I looed through logs and played with permissions but did not find the cause.
Does anyone know what would cause this? I have saved the old broken server if anyone cares to take a look.