diff --git a/back/imap/index.js b/back/imap/index.js
index 49a32bd..66c2977 100644
--- a/back/imap/index.js
+++ b/back/imap/index.js
@@ -5,8 +5,8 @@ const saveMessage = require('./storeMessage').saveMessage;
 
 
 const imap = new Imap({
-  user: '***REMOVED***',
-  password: '***REMOVED***',
+  user: '',
+  password: '',
   tlsOptions: {servername: "imap.gmail.com"},
   host: 'imap.gmail.com',
   port: 993,
diff --git a/back/sql/database.dart b/back/sql/database.dart
new file mode 100644
index 0000000..335c16d
--- /dev/null
+++ b/back/sql/database.dart
@@ -0,0 +1,105 @@
+Table "addresses" {
+  "id" int [pk, not null, increment]
+  "name" text
+  "localpart" text [not null]
+  "domain" text [not null]
+  "email" text [not null]
+
+  Indexes {
+    email [unique]
+  }
+}
+
+Table "mailboxes" {
+  "id" int [pk, not null, increment]
+  "name" text [not null]
+  "uidnext" int [not null, default: 1]
+  "nextmodseq" bigint [not null, default: 1]
+  "first_recent" int [not null, default: 1]
+  "uidvalidity" int [not null, default: 1]
+
+  Indexes {
+    name [unique]
+  }
+}
+
+Table "messages" {
+  "id" int [pk, not null, increment]
+  "idate" timestamp [not null]
+  "rfc822size" int
+}
+
+Table "mailbox_messages" {
+  "mailbox" int [not null]
+  "uid" int [pk, not null]
+  "message" int [pk, not null]
+  "modseq" bigint [not null]
+  "seen" boolean [not null, default: false]
+  "deleted" boolean [not null, default: false]
+}
+
+Ref: mailbox_messages.mailbox > mailboxes.id
+Ref: mailbox_messages.message - messages.id
+
+Table "bodyparts" {
+  "id" int [pk, not null, increment]
+  "bytes" int [not null]
+  "hash" text [not null]
+  "text" text
+  "data" binary
+}
+
+Table "part_numbers" {
+  "message" int [pk, not null]
+  "part" text [not null]
+  "bodypart" int [not null]
+  "bytes" int
+  "nb_lines" int
+}
+
+// todo on delete cascade
+Ref: part_numbers.message > messages.id
+Ref: part_numbers.bodypart - bodyparts.id
+
+Table "field_names" {
+  "id" int [pk, not null, increment]
+  "name" text [not null]
+
+  Indexes {
+    name [unique]
+  }
+}
+
+Table "header_fields" {
+  "id" int [pk, not null, increment]
+  "message" int [pk, not null]
+  "part" text [not null]
+  "position" int [not null]
+  "field" int [not null]
+  "value" text
+
+  Indexes {
+    message [unique]
+    part [unique]
+    position [unique]
+    field [unique]
+  }
+}
+
+Ref: header_fields.message > messages.id
+Ref: header_fields.part > part_numbers.part
+Ref: header_fields.field > field_names.id
+
+Table "address_fields" {
+  "message" int [not null]
+  "part" text [not null]
+  "position" int [not null]
+  "field" int [not null]
+  "number" int
+  "address" int [not null]
+}
+
+Ref: address_fields.message > messages.id
+Ref: address_fields.part > part_numbers.part
+Ref: address_fields.field > field_names.id
+Ref: address_fields.address > addresses.id
diff --git a/back/sql/database.png b/back/sql/database.png
new file mode 100644
index 0000000..97d79fd
Binary files /dev/null and b/back/sql/database.png differ
diff --git a/back/sql/database.sql b/back/sql/database.sql
new file mode 100644
index 0000000..a9a2490
--- /dev/null
+++ b/back/sql/database.sql
@@ -0,0 +1,108 @@
+CREATE TABLE `addresses` (
+  `id` int PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  `name` text,
+  `localpart` text NOT NULL,
+  `domain` text NOT NULL,
+  `email` text NOT NULL
+);
+
+CREATE TABLE `mailboxes` (
+  `id` int PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  `name` text NOT NULL,
+  `uidnext` int NOT NULL DEFAULT 1,
+  `nextmodseq` bigint NOT NULL DEFAULT 1,
+  `first_recent` int NOT NULL DEFAULT 1,
+  `uidvalidity` int NOT NULL DEFAULT 1
+);
+
+CREATE TABLE `messages` (
+  `id` int PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  `idate` timestamp NOT NULL,
+  `rfc822size` int
+);
+
+CREATE TABLE `mailbox_messages` (
+  `mailbox` int NOT NULL,
+  `uid` int NOT NULL,
+  `message` int NOT NULL,
+  `modseq` bigint NOT NULL,
+  `seen` boolean NOT NULL DEFAULT false,
+  `deleted` boolean NOT NULL DEFAULT false,
+  PRIMARY KEY (`uid`, `message`)
+);
+
+CREATE TABLE `bodyparts` (
+  `id` int PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  `bytes` int NOT NULL,
+  `hash` text NOT NULL,
+  `text` text,
+  `data` binary
+);
+
+CREATE TABLE `part_numbers` (
+  `message` int PRIMARY KEY NOT NULL,
+  `part` text NOT NULL,
+  `bodypart` int NOT NULL,
+  `bytes` int,
+  `nb_lines` int
+);
+
+CREATE TABLE `field_names` (
+  `id` int PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  `name` text NOT NULL
+);
+
+CREATE TABLE `header_fields` (
+  `id` int NOT NULL AUTO_INCREMENT,
+  `message` int NOT NULL,
+  `part` text NOT NULL,
+  `position` int NOT NULL,
+  `field` int NOT NULL,
+  `value` text,
+  PRIMARY KEY (`id`, `message`)
+);
+
+CREATE TABLE `address_fields` (
+  `message` int NOT NULL,
+  `part` text NOT NULL,
+  `position` int NOT NULL,
+  `field` int NOT NULL,
+  `number` int,
+  `address` int NOT NULL
+);
+
+CREATE UNIQUE INDEX `addresses_index_0` ON `addresses` (`email`);
+
+CREATE UNIQUE INDEX `mailboxes_index_1` ON `mailboxes` (`name`);
+
+CREATE UNIQUE INDEX `field_names_index_2` ON `field_names` (`name`);
+
+CREATE UNIQUE INDEX `header_fields_index_3` ON `header_fields` (`message`);
+
+CREATE UNIQUE INDEX `header_fields_index_4` ON `header_fields` (`part`);
+
+CREATE UNIQUE INDEX `header_fields_index_5` ON `header_fields` (`position`);
+
+CREATE UNIQUE INDEX `header_fields_index_6` ON `header_fields` (`field`);
+
+ALTER TABLE `mailbox_messages` ADD FOREIGN KEY (`mailbox`) REFERENCES `mailboxes` (`id`);
+
+ALTER TABLE `messages` ADD FOREIGN KEY (`id`) REFERENCES `mailbox_messages` (`message`);
+
+ALTER TABLE `part_numbers` ADD FOREIGN KEY (`message`) REFERENCES `messages` (`id`);
+
+ALTER TABLE `bodyparts` ADD FOREIGN KEY (`id`) REFERENCES `part_numbers` (`bodypart`);
+
+ALTER TABLE `header_fields` ADD FOREIGN KEY (`message`) REFERENCES `messages` (`id`);
+
+ALTER TABLE `header_fields` ADD FOREIGN KEY (`part`) REFERENCES `part_numbers` (`part`);
+
+ALTER TABLE `header_fields` ADD FOREIGN KEY (`field`) REFERENCES `field_names` (`id`);
+
+ALTER TABLE `address_fields` ADD FOREIGN KEY (`message`) REFERENCES `messages` (`id`);
+
+ALTER TABLE `address_fields` ADD FOREIGN KEY (`part`) REFERENCES `part_numbers` (`part`);
+
+ALTER TABLE `address_fields` ADD FOREIGN KEY (`field`) REFERENCES `field_names` (`id`);
+
+ALTER TABLE `address_fields` ADD FOREIGN KEY (`address`) REFERENCES `addresses` (`id`);