Build a Simple Email-Sending Web Form (HTML Email + Custom Subject + Sender/From Address Field)

I need a small web-based email sending form.

The form must allow me to:

Enter an email Subject (subject input field)

Paste a “From / Sender Email” address (one input field) — I want to change this any time before sending

Send an email using an HTML template (email body is HTML format)

Key Requirement (Important)

When the receiver gets the email, I want the From email to appear as whatever sender email I paste into the form.

Note: If real “From” spoofing isn’t possible due to email provider rules (SPF/DKIM/DMARC), the developer should propose a correct solution, such as:

Sending from a verified domain/email account and using Reply-To as the pasted email, or

Verifying multiple sender identities, or

Using an email service (SendGrid/Mailgun/AWS SES) with proper authentication.

Features / Flow

Web page with fields:

To Email

From Email (editable/paste field)

Subject

Send button

Uses a pre-made HTML email template (I will provide the HTML, or developer can create a basic one)

On submit:

Validates email fields

Sends the email

Shows success/error message

Tech Preference

Open to suggestions, but I prefer something simple like:

PHP + SMTP, or

Node.js / Python backend + SMTP, or

Integration with SendGrid/Mailgun/SES