diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..077e778
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,12 @@
+language: generic
+sudo: false
+addons:
+  apt:
+    packages:
+    - luarocks
+before_install:
+  - luarocks install --local luacheck
+script:
+- $HOME/.luarocks/bin/luacheck --no-color .
+notifications:
+  email: false
diff --git a/README.md b/README.md
index 37ce2b0..5d3a75d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Mail mod for Minetest
+Mail mod for Minetest (ingame mod)
 ======
 
 This is a fork of cheapies mail mod
@@ -33,6 +33,14 @@ Mails can be deleted, marked as read or unread, replied to and forwarded to anot
 
 See the "LICENSE" file
 
+# Textures
+* textures/email_mail.png (https://github.com/rubenwardy/email.git WTFPL)
+
+# Contributors
+
+* Cheapie (initial idea/project)
+* Rubenwardy (lua/ui improvements)
+
 # Old/Historic stuff
 * Old forum topic: https://forum.minetest.net/viewtopic.php?t=14464
 * Old mod: https://cheapiesystems.com/git/mail/
diff --git a/api.lua b/api.lua
index 1156ea3..a8d7e30 100644
--- a/api.lua
+++ b/api.lua
@@ -13,49 +13,44 @@ mail sending function, can be invoked with one object argument (new api) or
 all 4 parameters (old compat version)
 see: "Mail format" api.md
 --]]
-function mail.send(sender, receiver, subject, body)
+function mail.send(src, dst, subject, body)
 	local m
-	if receiver == nil and subject == nil and body == nil then
+	if dst == nil and subject == nil and body == nil then
 		-- new format (one object param)
-		m = sender
-
+		m = src
 	else
 		-- old format
-		-- create mail from params
-
 		m = {}
-		m.sender = sender
-		m.receiver = receiver
+		m.src = src
+		m.dst = dst
 		m.subject = subject
 		m.body = body
-
-	end
-
-	m.unread = true
-
-	if not m.time then
-		-- add timestamp
-		m.time = os.time()
 	end
 
 
-	minetest.log("action", "[mail] '" .. m.sender .. "' sends mail to '" .. m.receiver ..
+	minetest.log("action", "[mail] '" .. m.src .. "' sends mail to '" .. m.dst ..
 		"' with subject '" .. m.subject .. "' and body: '" .. m.body .. "'")
 
-	local messages = mail.getMessages(m.receiver)
+	local messages = mail.getMessages(m.dst)
 
-	table.insert(messages, 1, m)
-	mail.setMessages(m.receiver, messages)
+	table.insert(messages, 1, {
+		unread  = true,
+		sender  = m.src,
+		subject = m.subject,
+		body    = m.body,
+		time    = os.time(),
+	})
+	mail.setMessages(m.dst, messages)
 
 	for _, player in ipairs(minetest.get_connected_players()) do
 		local name = player:get_player_name()
-		if name == m.receiver then
+		if name == m.dst then
 			if m.subject == "" then m.subject = "(No subject)" end
 			if string.len(m.subject) > 30 then
 				m.subject = string.sub(m.subject,1,27) .. "..."
 			end
-			minetest.chat_send_player(m.receiver,
-					string.format(mail.receive_mail_message, m.sender, m.subject))
+			minetest.chat_send_player(m.dst,
+					string.format(mail.receive_mail_message, m.src, m.subject))
 		end
 	end
 
diff --git a/api.md b/api.md
index dec0a70..5d059c2 100644
--- a/api.md
+++ b/api.md
@@ -4,8 +4,8 @@ The mail format in the api hooks
 
 ```lua
 mail = {
-	sender = "source name",
-	receiver = "destination name",
+	src = "source name",
+	dst = "destination name",
 	subject = "subject line",
 	body = "mail body",
 	-- 8 attachments max
@@ -22,8 +22,8 @@ mail.send("source name", "destination name", "subject line", "mail body")
 New variant (1.1+)
 ```lua
 mail.send({
-	sender = "source name",
-	receiver = "destination name",
+	src = "source name",
+	dst = "destination name",
 	subject = "subject line",
 	body = "mail body"
 })
@@ -47,7 +47,6 @@ The mail format on-disk
 [{
 	"unread": true,
 	"sender": "sender name",
-	"receiver": "receiver name",
 	"subject": "subject name",
 	"body": "main\nmultiline\nbody",
 	"time": 1551258349,
diff --git a/init.lua b/init.lua
index c5c08e2..52e8141 100644
--- a/init.lua
+++ b/init.lua
@@ -1,4 +1,11 @@
 mail = {
+
+	-- mark webmail fork for other mods
+	fork = "webmail",
+
+	-- api version
+	apiversion = 1.1,
+
 	-- mail directory
 	maildir = minetest.get_worldpath().."/mails",
 
diff --git a/pics/ingame.png b/pics/ingame.png
new file mode 100644
index 0000000..d8c2035
Binary files /dev/null and b/pics/ingame.png differ
diff --git a/webmail.lua b/webmail.lua
index 3bcc9ff..72cc1a7 100644
--- a/webmail.lua
+++ b/webmail.lua
@@ -6,10 +6,9 @@ local Channel = dofile(MP .. "/util/channel.lua")
 local channel
 
 -- auth request from webmail
-local function auth_handler(data)
-	local auth = data.params
+local function auth_handler(auth)
 	local handler = minetest.get_auth_handler()
-	minetest.log("action", "[webmail] auth: " .. auth.playername)
+	minetest.log("action", "[webmail] auth: " .. auth.name)
 
 	local success = false
 	local banned = false
@@ -17,7 +16,7 @@ local function auth_handler(data)
 
 	if mail.webmail.disallow_banned_players and has_xban2_mod then
 		-- check xban db
-		local xbanentry = xban.find_entry(auth.playername)
+		local xbanentry = xban.find_entry(auth.name)
 		if xbanentry and xbanentry.banned then
 			banned = true
 			message = "Banned!"
@@ -26,24 +25,24 @@ local function auth_handler(data)
 
 	if not banned then
 		-- check tan
-		local tan = mail.tan[auth.playername]
+		local tan = mail.tan[auth.name]
 		if tan ~= nil then
 			success = tan == auth.password
 		end
 
 		-- check auth
 		if not success then
-			local entry = handler.get_auth(auth.playername)
-			if entry and minetest.check_password_entry(auth.playername, entry.password, auth.password) then
+			local entry = handler.get_auth(auth.name)
+			if entry and minetest.check_password_entry(auth.name, entry.password, auth.password) then
 				success = true
 			end
 		end
 	end
 
 	channel.send({
-		method = data.method,
-		id = data.id,
-		result = {
+		type = "auth",
+		data = {
+			name = auth.name,
 			success = success,
 			message = message
 		}
@@ -51,74 +50,47 @@ local function auth_handler(data)
 end
 
 -- send request from webmail
-local function send_handler(data)
+local function send_handler(sendmail)
 	-- send mail from webclient
-	if not data.params then
-		return
-	end
-
-	minetest.log("action", "[webmail] sending mail from webclient: " .. data.params.sender ..
-		" -> " .. data.params.receiver)
-
-	mail.send(data.params)
-
-	channel.send({
-		method = data.method,
-		id = data.id,
-		result = {
-			success = true
-		}
-	})
+	minetest.log("action", "[webmail] sending mail from webclient: " .. sendmail.src .. " -> " .. sendmail.dst)
+	mail.send(sendmail)
 end
 
 -- get player messages request from webmail
-local function get_player_messages_handler(data)
-	local messages = mail.getMessages(data.params.playername)
+local function get_player_messages_handler(playername)
+	local messages = mail.getMessages(playername)
 	channel.send({
-		method = data.method,
-		id = data.id,
-		result = messages
+		type = "player-messages",
+		playername = playername,
+		data = messages
 	})
 end
 
 -- remove mail
-local function delete_mail_handler(data)
-	local index = data.params.index
-	local playername = data.params.playername
-
+local function delete_mail_handler(playername, index)
 	local messages = mail.getMessages(playername)
 	if messages[index] then
 		table.remove(messages, index)
 	end
 	mail.setMessages(playername, messages)
-	-- TODO: check subject
-
-	channel.send({
-		method = data.method,
-		id = data.id,
-		result = { success = true }
-	})
 end
 
 -- mark mail as read
-local function mark_mail_read_handler(data)
-	local index = data.params.index
-	local playername = data.params.playername
-	local read = data.params.read
-
+local function mark_mail_read_handler(playername, index)
 	local messages = mail.getMessages(playername)
-
 	if messages[index] then
-		messages[index].unread = not read
+		messages[index].unread = false
 	end
 	mail.setMessages(playername, messages)
-	-- TODO: check subject
+end
 
-	channel.send({
-		method = data.method,
-		id = data.id,
-		result = { success = true }
-	})
+-- mark mail as unread
+local function mark_mail_unread_handler(playername, index)
+	local messages = mail.getMessages(playername)
+	if messages[index] then
+		messages[index].unread = true
+	end
+	mail.setMessages(playername, messages)
 end
 
 function mail.webmail_send_hook(m)
@@ -135,21 +107,23 @@ function mail.webmail_init(http, url, key)
 	})
 
 	channel.receive(function(data)
-		if data.method == "auth" then
-			auth_handler(data)
+		if data.type == "auth" then
+			auth_handler(data.data)
 
-		elseif data.method == "get-mails" then
-			get_player_messages_handler(data)
+		elseif data.type == "send" then
+			send_handler(data.data) -- { src, dst, subject, body }
 
-		elseif data.method == "mark-mail-read" then
-			mark_mail_read_handler(data)
+		elseif data.type == "delete-mail" then
+			delete_mail_handler(data.playername, data.index) -- index 1-based
 
-		elseif data.method == "delete-mail" then
-			delete_mail_handler(data)
+		elseif data.type == "mark-mail-read" then
+			mark_mail_read_handler(data.playername, data.index) -- index 1-based
 
-		elseif data.method == "send" then
-			send_handler(data)
+		elseif data.type == "mark-mail-unread" then
+			mark_mail_unread_handler(data.playername, data.index) -- index 1-based
 
+		elseif data.type == "player-messages" then
+			get_player_messages_handler(data.data)
 
 		end
 	end)