> For the complete documentation index, see [llms.txt](https://globosoftware.gitbook.io/globosoftware-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://globosoftware.gitbook.io/globosoftware-docs/email-notifications/custom-sender/set-up-email-api.md).
# Set Up Email API
Send your form emails through an email service like SendGrid or Mailgun, so they come from your own verified address instead of the app's default one.
## 🔄 How It Works
```
Connect a provider (Settings)
→ Apply it to a form (Mail tab)
→ Emails send through your provider
```
Once applied, these emails all go through your provider:
* Admin emails
* Customer notification emails
It only affects emails from **Powerful Contact Form Builder**, not Shopify's own notification emails.
## 🔧 Step 1: Connect Your API in Settings
1. Open the app > **Settings** > **Custom Mail & SMTP**
2. Under **Mail SMTP & API**, open **Provider** and choose your service
3. Enter the details it asks for (see the table above)
4. *(Optional)* Set custom sender information
5. Click **Save**
6. Scroll to **Send a test email**, enter your address, click **Send**
> **⚠️ Note:** Save before testing. The test uses your saved settings.
## ✅ Step 2: Apply It to the Form
Connecting a provider doesn't switch your forms automatically. Apply it to each form that should use it.
1. **G**o to **Forms** > open the form
2. Click the **Mail** icon on the left > **Admin**
3. Scroll down to **Use SMTP & API** > select **Mail provider**
4. Click **Save**
> **📌 Note:** **Mail provider** uses the provider you saved in **Settings** in Step 1. Repeat these steps for every form that should send through it.
Then submit the form once and check the sender address.
## ❓ FAQs
Which emails go through my email API?
Admin emails, customer notification emails, and conditional emails, for every form you've applied it to.
Do I need to apply it to every form?
Yes. Connecting a provider in Settings doesn't switch forms automatically. Set **Use SMTP & API** to **Mail provider** on each form. Forms left on the default keep sending from the app's address.
My provider isn't in the list. Can I still connect it?
API is only available for the listed providers. If yours supports SMTP, use Set up SMTP instead.
Should I use SMTP or an email API?
Use SMTP if you already have a mailbox and send a small volume. Use an email API for high volume or delivery reports. Mailboxes like Gmail and Outlook cap how much they can send per day.
Can I change the "From name" or "From email"?
Yes, under custom sender information. The **From email** must be verified with your provider, or it can be rejected or land in spam.
Can one form use a different sender?
Yes. On that form, under **Use SMTP & API**, choose **Use custom API** and enter the details. Your store-wide settings stay unchanged.
My test email succeeded, but I didn't get it.
A success message only means your provider accepted the email. Check your Spam or Junk folder, and confirm your sender address or domain is verified with the provider.
What if I revoke or replace my API key?
Emails will stop sending. Paste the new key in **Settings** > **Custom Mail & SMTP** and click **Save**.
> **Still need help?** Contact support at and include the exact error message shown.
