# Free Native SSL via Let's Encrypt

{% hint style="info" %}
Before you begin, make sure Port 443 is open and unblocked by any other application, firewall, or SELinux policies on your server. 
{% endhint %}

{% hint style="info" %}
This will enable HTTPS:// for your ESP, and also replace your Transactional SMTP Relay self-signed certificate with a real certificate so TLS will work with all SMTP Relay connecting applications. 
{% endhint %}

{% hint style="success" %}
Instructions for automating the renewal of your Let's Encrypt certificate every 30 days are at the end of this document, this is a one-time "set it and forget it" process. 
{% endhint %}

Log into your VPS using SSH on macOS or PuTTY on Windows .

Change directory to your ESP installation:

```
cd edcom-install
```

Run this command and provide your ESP subdomain and domain as an argument.

```
./generate_letsencrypt_certificate.sh esp.yourdomain.com
```

**\*\*\* Note:** Use the the real subdomain and domain of your VPS above, not esp.yourdomain.com, this is just a placeholder. This is the domain you use to access your ESP with http\:// currently.

Convert your ESP to use HTTPS:// from now on: 

```
./convert_to_ssl.sh
```

Restart your ESP: 

```
./restart.sh
```

{% hint style="info" %}
**Create an automated cron job that renews your Let's Encrypt certificate every 30 days.** 
{% endhint %}

Run the following command and when you're asked which editor to use, select nano:

```
crontab -e
```

<figure><img src="/files/3W8eZFLz8yQrW3Ay0fkR" alt=""><figcaption></figcaption></figure>

Copy and paste the following into the bottom of the editor, change the placeholder domain to your real ESP domain, and hit ctrl-x to save:

{% code overflow="wrap" %}

```
* * */30 * * cd /root/edcom-install && ./renew_letsencrypt_certificate.sh esp.yourdomain.com > data/logs/certbot.log 2>&1
```

{% endcode %}

**\*\*\* Note:** Use the the real subdomain and domain of your VPS above, not esp.yourdomain.com, this is just a placeholder. This is the domain you use to access your ESP with http\:// currently.

<figure><img src="/files/OduG2ytjVeP4HqIxC0Pm" alt=""><figcaption></figcaption></figure>

**\*\*\* Note:** If your ESP is installed somewhere else other than /root/edcom-install you will need to modify that as well.

{% hint style="success" %}
**You're done!**\
Access your ESP using https\:// from now on, and use https\:// for all related configuration, such as the mta.conf file, API connections, Pabbly integrations, etc.&#x20;
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.emaildelivery.com/docs/options-for-adding-https/free-native-ssl-via-lets-encrypt.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.