# Build an Email Simulator - Step 15

**URL:** <https://forum.freecodecamp.org/t/build-an-email-simulator-step-15/800606>\
**Category:** Curriculum Help\
**Tags:** english-curriculum\
**Created:** [September 20, 2026, 2:41am UTC](https://forum.freecodecamp.org/t/build-an-email-simulator-step-15/800606 "2026-09-20T02:41:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tsirha](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/tsirha/32/406395_2.png) [@Tsirha](https://forum.freecodecamp.org/u/Tsirha)\
**Post date:** [September 20, 2026, 2:41am UTC](https://forum.freecodecamp.org/t/build-an-email-simulator-step-15/800606/1 "2026-09-20T02:41:20Z")

</div>

### Tell us what’s happening:

It appears there is no error so far, but I am not able to go forward. lease help.

### Your code so far

```py
class Email:
    def __init__ (self, sender, receiver, subject, body):
        self.sender = sender
        self.receiver = receiver
        self.subject = subject
        self.body = body
        self.read = False

    def mark_as_read(self):
        self.read = True

class Inbox:
    def __init__ (self):
        self.emails = []

    def add_email(self, email):
        self.emails.append(email)

class User:
    def __init__ (self, name):
        self.name = name
        self.inbox = Inbox() # Each user gets an Inbox object

    def send_email(self, receiver, subject, body):
        # Create the email object
        email = Email(
            sender=self, 
            receiver=receiver, 
            subject=subject, 
            body=body
        )
        
# User Editable Region
        
class Inbox:
    def receive_email(self, email):
        self.emails.append(email)
      

        
      
# User Editable Region

```

### Your browser information:

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36`

### Challenge Information:

Build an Email Simulator - Step 15

> **[freeCodeCamp.org](https://www.freecodecamp.org/learn/python-v9/workshop-email-simulator/step-15)**
>
> Learn to Code for Free

GitHub Link: [freeCodeCamp/curriculum/challenges/english/blocks/workshop-email-simulator/68b9366fae8b13c1278761b1.md at main · freeCodeCamp/freeCodeCamp · GitHub](https://github.com/freeCodeCamp/freeCodeCamp/blob/main/curriculum/challenges/english/blocks/workshop-email-simulator/68b9366fae8b13c1278761b1.md)

---

<div class="post-metadata">

**Author:** ![sanity](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/sanity/32/378897_2.png) [@sanity](https://forum.freecodecamp.org/u/sanity)\
**Post date:** [September 20, 2026, 4:22am UTC](https://forum.freecodecamp.org/t/build-an-email-simulator-step-15/800606/2 "2026-09-20T04:22:34Z")

</div>

Hmm, in the code above there are two declarations of the `Inbox` class. That might be reason why tests don’t pass.