email@example.com is the main list for general MySQL discussion. It's the right place to ask for help when you encounter general problems, such as installation problems.
You should not contact the MySQL developers if you have an installation problem. However, if you have purchased commercial support from MySQL AB, a support person might get you in contact with a MySQL developer.
firstname.lastname@example.org is the public address of the MySQL documentation team. You should report your problem to that address only if you find that the MySQL documentation is unclear.