> For the complete documentation index, see [llms.txt](https://dexcore.gitbook.io/guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dexcore.gitbook.io/guide/dexcore-guide-es/setup/installation/proxy-file.md).

# Proxy File Setup

{% hint style="info" %}
**What is a proxy?** A proxy is a middleman server that connects to the internet on your behalf. Instead of your computer connecting directly to Outlook, the bot connects through the proxy. This prevents Outlook from blocking your accounts for too many connections from one location.
{% endhint %}

***

## Before You Start

{% hint style="warning" %}
Make sure you have:

1. ISP proxies purchased from a proxy provider (residential proxies are NOT recommended for Outlook)
2. DexCore installed — 👉 [Installation](/guide/dexcore-guide-es/setup/installation/installation.md)
   {% endhint %}

***

## How to Set Up

1. Find the file `proxy.txt` in your DexCore folder.
2. Open it with **Notepad** (right-click → Open with → Notepad).
3. Paste your proxies in this format — **one proxy per line**:

```
proxyip:proxyport:proxyuser:proxypassword
```

### Example (fake data):

```
154.21.33.87:8080:johnsmith:Pass1234
92.118.44.12:3128:user99:SecretPw!
203.45.167.5:7777:proxyacct:myP@ss99
```

{% hint style="warning" %}
**Format:** one proxy per line, no spaces, no empty lines. All four parts separated by colons: `ip:port:username:password`
{% endhint %}

{% hint style="success" %}
During the login process, proxies will be automatically assigned in the task file for each account. You don't need to add them manually to the task file, but that option is available.
{% endhint %}

{% hint style="success" %}
If any proxy stops working, the bot will automatically replace it with another one from your list.
{% endhint %}

<figure><img src="https://3501206644-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWdSIk44MDfZ4hu7Qf8gt%2Fuploads%2Fgit-blob-ce53f91ec3b16ece1ed357adb739f3f8a0aa2695%2Fproxy-file.png?alt=media" alt=""><figcaption></figcaption></figure>

***

For detailed recommendations on proxy types, ratios, and ISP selection, see 👉 [Proxies — Best Practices](/guide/dexcore-guide-es/setup/best-practices/proxies.md).

***

## Common Issues

{% hint style="warning" %}

* Residential proxies cause account locks — use **ISP proxies**
* Empty lines or spaces in the file break parsing
* An empty `proxy.txt` causes "Index out of bounds" error
  {% endhint %}