btcpayserver/BTCPayServer/Views/Shared/EmailsTest.cshtml

@model BTCPayServer.Models.EmailsViewModel

<h3 class="my-3">Testing</h3>
<div class="row">
    <div class="col-xl-10 col-xxl-constrain">
        <div class="form-group">
            <label asp-for="TestEmail" class="form-label">To test your settings, enter an email address</label>
            <input asp-for="TestEmail" placeholder="Firstname Lastname <email@example.com>" class="form-control" />
            <span asp-validation-for="TestEmail" class="text-danger"></span>
        </div>
        <button type="submit" class="btn btn-secondary mt-2" name="command" value="Test" id="Test">Send Test Email</button>
    </div>
</div>