Email Signatures in <span class="grad">cPanel</span>

Overview

Badex Signature works with cPanel by acting as your outgoing SMTP relay. When you (or your users) send email through cPanel webmail (Roundcube or Horde) or any email client connected to your cPanel hosting, the email routes through Badex first — where your professional signature is injected and DKIM signed — before being delivered to the recipient.

Method 1 — Configure in Roundcube Webmail (Recommended)

This method configures the SMTP relay directly in Roundcube. Every email sent from Roundcube will automatically go through Badex.

Step 1 — Log into Roundcube

Go to your cPanel webmail. The URL is usually:

https://yourdomain.com/webmail
# or
https://mail.yourdomain.com

Select Roundcube from the webmail options.

Step 2 — Open SMTP Settings

In Roundcube, click the ⚙ Settings icon (top right) → Preferences → Server Settings (or SMTP Settings depending on your Roundcube version).

Step 3 — Configure Outgoing Server

Fill in the following settings:

Step 4 — Save and Test

Click Save. Send a test email to a Gmail or Outlook address. Check the email headers — you should see:

X-BADEX-Signature-Processed: 1
DKIM-Signature: v=1; a=rsa-sha256; d=yourdomain.com; ...

Method 2 — WHM Smarthost (All Accounts)

If you have WHM access, you can configure Badex as a smarthost for all cPanel accounts on the server. This means every email from every account will get signatures automatically.

Step 1 — Open Exim Configuration

Log into WHM → search for "Exim Configuration Manager" → click Advanced Editor.

Step 2 — Add Smarthost Configuration

In the Routers section, add before the send_via_smtp router:

badex_smarthost:
  driver = manualroute
  domains = !+local_domains
  transport = remote_smtp
  route_list = * smtp.signature.badex.app::587

In the Authenticators section, add:

badex_login:
  driver = plaintext
  public_name = LOGIN
  client_send = : your-email@yourdomain.com : your-badex-password

Step 3 — Save and Restart Exim

Click Save at the bottom. Exim will restart automatically. All outbound email will now route through Badex Signature.

Method 3 — Email Client (Outlook, Thunderbird, Apple Mail)

If your users access cPanel email via an email client (not webmail), configure the outgoing SMTP server in the email client directly:

• In Outlook: Account Settings → More Settings → Outgoing Server
• In Thunderbird: Account Settings → Outgoing Server (SMTP)
• In Apple Mail: Preferences → Accounts → Server Settings → Outgoing Mail Server

Use the same settings: smtp.signature.badex.app:587 STARTTLS with your Badex SMTP credentials.

Verify It's Working

Send a test email to your Gmail. Open the email and click ⋮ → Show original. You should see:

SPF:   PASS with IP 157.173.98.136
DKIM:  PASS with domain yourdomain.com
DMARC: PASS

Troubleshooting