Refactor in multiple files. First working version.

test_conf.toml

@@ -16,7 +16,7 @@
   [default.server]
     address = "1.3.1.2"
     port = 587
-    encryption = true
+    encryption = "tls"
     user = "faggiano@uccelli.net"
     password = "yougetit"
 
@@ -38,7 +38,7 @@
   [personal.server]
     address = "10.13.12.10"
     port = 25
-    encryption = true
+    encryption = "starttls"
     user = "master@domain.local"
     password = "yougetitagain"
 
@@ -46,5 +46,5 @@
   [secret.server]
     address = "my.server.org"
     port = 12345
-    encryption = false
+    encryption = "tls"
     user = "me"