diff --git a/README.md b/README.md
index 9f86bcb..c9903f9 100755
--- a/README.md
+++ b/README.md
@@ -1,48 +1,49 @@
-# µMail (MicroMail)
-A lightweight, scalable SMTP client for sending email in MicroPython.
-
-
-## Usage:
-
-A bare minimal approach
-
-```py
-import umail
-smtp = umail.SMTP('smtp.gmail.com', 587, username='my@gmail.com', password='mypassword')
-smtp.to('someones@gmail.com')
-smtp.send("This is an example.")
-smtp.quit()
-```
-
-
-## API docs:
-
-* **`umail.SMTP(host, port, [ssl, username, password])`**
-  * **host** - smtp server
-  * **port** - server's port number
-  * **ssl** - set `True` when SSL is required by the server
-  * **username** - my username/email to the server
-  * **password** - my password
-
-* **`SMTP.login(username, password)`**
-  If you did not login when intializing the server, do it here!
-
-* **`SMTP.to(addrs)`**
-  * **addrs** - Recipient's email address. If multiple recipents, use a list, eg. `['aaa@mail.com', 'bbb@mail.com']`
-
-* **`SMTP.write(content)`**
-  To send a long email or an email that contains large attachments, you will most likely exceed the memory limit of your MCU.\
-  Use this function to break up your email into smaller chunks.\
-  Each call to `write()` will cause the current `content` to be sent to the server so you can load the next chunk.
-
-* **`SMTP.send([content])`**
-  Finish writing the email.\
-  Make the SMTP server to actually send your email to the recipent address.
-
-* **`SMTP.quit()`**
-  Close the connection to the server
-
-
-## Other
-
-For more details, pleasse refer to sample code under `examples\`
+# µMail (MicroMail)
+A lightweight, scalable SMTP client for sending email in MicroPython.
+
+
+## Usage:
+
+A bare minimal approach
+
+```py
+import umail
+smtp = umail.SMTP('smtp.gmail.com', 587, username='my@gmail.com', password='mypassword')
+smtp.to('someones@gmail.com')
+smtp.send("This is an example.")
+smtp.quit()
+```
+
+
+## API docs:
+
+* **`umail.SMTP(host, port, [ssl, username, password])`**
+  * **host** - smtp server
+  * **port** - server's port number
+  * **ssl** - set `True` when SSL is required by the server
+  * **username** - my username/email to the server
+  * **password** - my password
+
+* **`SMTP.login(username, password)`**
+  If you did not login when intializing the server, do it here!
+
+* **`SMTP.to(addrs, mail_from)`**
+  * **addrs** - Recipient's email address. If multiple recipents, use a list, eg. `['aaa@mail.com', 'bbb@mail.com']`
+  * **mail_from** - manually specify the MAIL FROM address, default value is your smtp username. [example](examples/example_mail_from.py)
+
+* **`SMTP.write(content)`**
+  To send a long email or an email that contains large attachments, you will most likely exceed the memory limit of your MCU.\
+  Use this function to break up your email into smaller chunks.\
+  Each call to `write()` will cause the current `content` to be sent to the server so you can load the next chunk.
+
+* **`SMTP.send([content])`**
+  Finish writing the email.\
+  Make the SMTP server to actually send your email to the recipent address.
+
+* **`SMTP.quit()`**
+  Close the connection to the server
+
+
+## Other
+
+For more details, pleasse refer to sample code under `examples\`
diff --git a/examples/example_mail_from.py b/examples/example_mail_from.py
new file mode 100755
index 0000000..04fdbd9
--- /dev/null
+++ b/examples/example_mail_from.py
@@ -0,0 +1,17 @@
+#
+# Setting the MAIL FROM address
+#
+# Some services may require you to set the MAIL FROM address different than your 
+# login username. In such cases, you can manually specify the address by
+# smtp.to(mail_from=address)
+# If argument not set, MAIL FROM address will be default to your login username.
+#
+# Read more about MAIL FROM:
+# https://docs.aws.amazon.com/ses/latest/DeveloperGuide/mail-from.html
+#
+
+import umail
+smtp = umail.SMTP('email-smtp.us-west-2.amazonaws.com', 587, username='myusername', password='mypassword')
+smtp.to('someones@gmail.com', mail_from='my@gmail.com')
+smtp.send("This is an example.")
+smtp.quit()