diff --git a/README.md b/README.md
index fc660d4..1458069 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,21 @@ Following environment variables must be defined:
 yarn && yarn run build:all
 ```
 
-## Initializing Fluid-SES
+## Run tests
+
+```bash
+yarn run test:all
+```
+
+## Basic usages
+
+### Initializing Fluid-SES
 
 ```typescript
 const fluidSes = new FluidSes({ region: 'eu-west-1' });
 ```
 
-## Sending a mail
+### Sending a mail
 ```typescript
 await fluidSes.sourceName('Fluid mailer')
       .sourceMail('fluid-mailer@something.com')
@@ -28,3 +36,131 @@ await fluidSes.sourceName('Fluid mailer')
       .template('My incredible message')
       .sendMail();
 ```
+
+
+## Constructor optional options
+
+### defaultSourceName and defaultSourceMail
+In order to avoid specifying sender identity each time, you can give default value for those
+
+```typescript
+const fluidSes = new FluidSes({ 
+    region: 'eu-west-1',
+    defaultSourceName: 'System sender',
+    defaultSourceMail: 'sytem-sender@your-company.com'
+});
+```
+
+### mailTrap
+Fluid SES allows you to filter addressees based on a custom function. If addressee list ends up empty after the call of the mailTrap method, it ends up not sending a mail at all.
+Here is the signature :
+```typescript
+mailTrap: (addressees: Array<string | Address>) => Promise<Array<string | Address>>;
+```
+
+Example:
+```typescript
+const myMailTrap = async (addressees: Array<string | Address>) => {
+    return process.env.env === 'prod' ? addressees : [];
+}
+
+const fluidSes = new FluidSes({ 
+    region: 'eu-west-1',
+    mailTrap: myMailTrap
+});
+```
+
+### templateEngine
+If you want to use another template engine, you can define new ones this way
+
+```typescript
+class MyCustomTemplateEngine extends ITemplateEngine {
+    getComputedTemplate (options: CustomTemplatingOptions): Promise<string> {
+      // Process and then returns filled template as a promise
+    };
+}
+
+const fluidSes = new FluidSes({
+    region: 'eu-west-1',
+    templateEngine: MyCustomTemplateEngine
+});
+```
+
+
+## Templating
+
+### With default template engine
+```typescript
+const defaultTemplate = 'Hello {{ name }}, ' +
+    'your {{ article }} with number {{ command }} has been shipped.';
+
+const myTemplate: ITemplateEngineOptions = {
+    template: defaultTemplate,
+    templateMapping: {
+        name: 'Joe',
+        article: 'Computer',
+        command: '21673',
+    },
+};
+
+await fluidSes.sourceName('Fluid mailer')
+      .sourceMail('fluid-mailer@something.com')
+      .addressees(['someone@something.com','someoneElse@something.com'])
+      .subject('Urgent matter')
+      .template(myTemplate)
+      .sendMail();
+```
+
+## Other options
+
+### useBcc
+
+```typescript
+await fluidSes.sourceName('Fluid mailer')
+      .sourceMail('fluid-mailer@something.com')
+      .addressees(['someone@something.com','someoneElse@something.com'])
+      .subject('Urgent matter')
+      .useBcc(true) // default is false
+      .template('My incredible message')
+      .sendMail();
+```
+This will use only the first addressee of the array as 'to' material and the others will be added as bcc.
+
+### attachments
+This allows you to add attachments to your mails.
+```typescript
+const attachments: Attachment[] = [{ filename: 'something' }];
+
+await fluidSes.sourceName('Fluid mailer')
+    .sourceMail('fluid-mailer@something.com')
+    .addressees(['someone@something.com','someoneElse@something.com'])
+    .subject('Urgent matter')
+    .attachments(attachments)
+    .template('My incredible message')
+    .sendMail();
+```
+
+### additionalOptions
+If you are willing to use Nodemailer options that aren't already supported by Fluid SES you can still use them this way :
+
+```typescript
+const myNodeMailerOptions: Mail.Options = {
+    encoding: 'utf-8',
+};
+
+await fluidSes.sourceName('Fluid mailer')
+    .sourceMail('fluid-mailer@something.com')
+    .addressees(['someone@something.com','someoneElse@something.com'])
+    .subject('Urgent matter')
+    .additionalOptions(myNodeMailerOptions) // Won't override options comming natively from Fluid SES
+    .template('My incredible message')
+    .sendMail();
+
+await fluidSes.sourceName('Fluid mailer')
+    .sourceMail('fluid-mailer@something.com')
+    .addressees(['someone@something.com','someoneElse@something.com'])
+    .subject('Urgent matter')
+    .additionalOptions(myNodeMailerOptions, true) // Will override options comming natively from Fluid SES
+    .template('My incredible message')
+    .sendMail();
+```