I suggest also avoid that. You can do FTP and e-mail via other common linux packages, which is going to be much better, safer, and easier.
If you are planning on running any debian-based distro, the best option is to simply run Webmin, and use it to set up postfix, webmail, addresses, and sftp.
It may require a bit more resources, but it all depends on how old your machine is.
Our old work server used to handle mail and other stuff on a puny Celeron J4005, but before that it was still feeling comfortable on an old Atom D525. I'm currently in the process of rebuilding the whole thing and replacing current 3 servers with a "brand new" and shiny Supermicro X11. Should be able to run it all in VMs on ESXi and then some...