MVC - request denied where the query string is too long - RESOLVED

[Andy_L_J]

Apologies in advance for the long post. I am getting the following error in my MVC app: HTTP Error 404.15 - Not Found The request filtering module is configured to deny a request where the query string is too long. Here is my code:

public class MailHelper
{
public string To { get; set; }
public string From { get; set; }
public string Subject { get; set; }
public string Message { get; set; }
public string ImageUrl { get; set; }

public MaiHelper() {}

public bool IsValid()
{
  return !(EmailDate == null) && !(string.IsNullOrEmpty(To)) &&
	!(string.IsNullOrEmpty(From)) && !(string.IsNullOrEmpty(Subject)) &&
	!(string.IsNullOrEmpty(Message)) && !(string.IsNullOrEmpty(BannerUrl));
}

}

// Mail Controller...
public ActionResult Index()
{
MailHelper mH = New MailHelper();
mH.EmailDate = DateTime.UtcNow;
mh.From = "some@adress.com";

return View(mH);

}

I am using an external jQuery library ckeditor to get RTB functionality in my Razor page:.

/*Index.cshtml*/
@Model Controllers.MailHelper
@{
Layout = null;
}
...

@using (Html.BeginForm("Send", "Mail", FormMethod.Get))
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)

<fieldset>
<legend>MailHelper</legend>

<table style="width: 700px;">
<tr>
<th>Date</th>
<td>@Html.EditorFor(model => model.EmailDate)
					@Html.ValidationMessageFor(model => model.EmailDate)</td>
			</tr>
			<tr>
				<th>To</th>
				<td>@Html.EditorFor(model => model.To)
					@Html.ValidationMessageFor(model => model.To)</td>
			</tr>
			<tr>
				<th>From</th>
				<td>@Html.EditorFor(model => model.From)
					@Html.ValidationMessageFor(model => model.From)</td>
			</tr>
			<tr>
				<th>Subject</th>
				<td>@Html.EditorFor(model => model.Subject)
					@Html.ValidationMessageFor(model => model.Subject)</td>
			</tr>
			<tr>
				<th>To</th>
				<td>@Html.TextAreaFor(model => model.Message, new { @class = "ckeditor", @id = "text-details" })
					@Html.ValidationMessageFor(model => model.Message)</td>
			</tr>
			<tr>
				<th>Banner Url</th>