# Pepipost (Netcore)

Source: https://catalystgroup.gg/docs/email-delivery/mailer-pepipost/
Updated: 2026-10-19 · By Duane Garner

Connect CRM-NG SMTP to Pepipost, now Netcore Email API, with an API key and a verified sending domain.

This guide shows you how to send your WordPress email through Pepipost, the transactional email service that is now part of Netcore Cloud and sold as the Netcore Email API. It suits businesses already using Netcore, and senders with customers in India and Asia, where Netcore is strong. Netcore has offered a free trial allowance for new accounts; check its site for the current terms.

 

The **Pepipost** mailer sends through the Pepipost/Netcore email API with an API key. You also verify the domain you send from.

 

> **Names you may see:** Netcore has moved the product between names and addresses over the years. You may see Pepipost, Netcore Email API or Netcore Cloud, and the dashboard may open at `app.pepipost.com` or a `netcorecloud.com` address. The steps are the same; look for the pages named below.

 

## Before you start

 
- A Pepipost or Netcore Email API account (start at `https://netcorecloud.com/`).
- A domain you control, with access to its DNS records.
- Administrator access to your WordPress site.

 

## Step 1: Add and verify your sending domain

 
1. Sign in
  Sign in to your Pepipost or Netcore email dashboard.
2. Open sending domains
  Open **Settings** and look for **Sending Domains** (or **Domains**).
3. Add your domain
  Enter the domain you will send from.
4. Publish the records
  The dashboard shows SPF and DKIM records (and sometimes a tracking CNAME). Add them at your DNS provider exactly as shown.
5. Verify
  Return and run the check until the domain shows as verified or active. Netcore may also review new domains before they can send.

 

See [Adding DNS records](https://catalystgroup.gg/docs/email-delivery/dns-records/) if you are new to DNS.

 

## Step 2: Get your API key

 
1. Open the integration page
  Open **Settings → Integration** (the plugin's **Get the API Key** link goes to `https://app.pepipost.com/app/settings/integration`).
2. Copy the key
  Find the API key for the email API and copy it. If you have several keys, use one for this site only, so you can revoke it on its own.

 

## Step 3: Connect in CRM-NG SMTP

 
1. Choose the mailer
  In WordPress, open **CRM-NG SMTP → Settings → General** and set **Mailer** to **Pepipost**.
2. Paste the key
  Paste the key into **API Key**.
3. Set the sender
  Set **From Email** to an address on your verified domain and set **From Name**. Tick **Force From Email** so other plugins cannot use an unverified domain.
4. Save
  Press **Save Settings**.

 

> **Pepipost SMTP:** An older **Pepipost SMTP** option only appears on sites that already had it switched on. For a new setup, use the **Pepipost** API mailer described here. If you must use SMTP, enter the SMTP details from your Netcore dashboard in [Other SMTP](https://catalystgroup.gg/docs/email-delivery/mailer-other-smtp/).

 

## Send a test email

 

Open **CRM-NG SMTP → Tools → Email Test**, enter your address in **Send To**, and press **Send Email**. The reports or logs page in your Netcore dashboard shows the message status. See [Sending a test email](https://catalystgroup.gg/docs/email-delivery/send-a-test-email/).

 

## Troubleshooting

 
- The key is wrong, deleted, or belongs to another account: [401 Unauthorized or Forbidden](https://catalystgroup.gg/docs/email-delivery/error-401-unauthorized-or-forbidden/) and [Invalid API key](https://catalystgroup.gg/docs/email-delivery/error-invalid-api-key/)
- The From domain is not verified or not yet approved: [553 Sender address rejected](https://catalystgroup.gg/docs/email-delivery/error-553-sender-address-rejected/)
- Your trial or plan limit is used up: [Email sending limit reached](https://catalystgroup.gg/docs/email-delivery/error-email-sending-limit/)
- The recipient bounced before and is blocked: [Email address in suppression list](https://catalystgroup.gg/docs/email-delivery/error-email-in-suppression-list/)
- The server cannot reach the API: [cURL error](https://catalystgroup.gg/docs/email-delivery/error-curl-error/)
- Mail arrives in spam: [Emails landing in spam](https://catalystgroup.gg/docs/email-delivery/emails-landing-in-spam/)

 

## Related

 
- [Choosing a mail service](https://catalystgroup.gg/docs/email-delivery/choose-a-mailer/)
- [Adding DNS records: SPF, DKIM and DMARC](https://catalystgroup.gg/docs/email-delivery/dns-records/)
- [Verifying your DNS records](https://catalystgroup.gg/docs/email-delivery/verify-dns-records/)
- [Sender name, address and the Force settings](https://catalystgroup.gg/docs/email-delivery/sender-name-and-address/)
- [Debug events](https://catalystgroup.gg/docs/email-delivery/debug-events/)