Add example config

examples/sendmail.toml

@@ -0,0 +1,16 @@
+[default]
+  from = "my.default@example.com"
+
+  [default.server]
+    address = "mail.example.com"
+    port = 587
+    user = "my.default@example.com"
+    password = "correcthorsebatterystaple"
+
+[other-account]
+  from = "my.other@mailprovider.org"
+
+  [ai.server]
+    address = "smtp.mailprovider.org"
+    port = 587
+    user = "my.correct.username@mailprovider.org"