var client = new OpenPop.Pop3.Pop3Client();
client.Connect("pop.mail.ru", 995, true);
client.Authenticate("Mail", "Password", OpenPop.Pop3.AuthenticationMethod.UsernameAndPassword);
int countMessage = client.GetMessageCount();
var count = client.GetMessageCount();
Pop3Message message = client.GetMessage(count);
listBox1.Items.Add(message.Headers.Subject);// заголовок
listBox1.Items.Add(message.Headers.From);//от кого
listBox1.Items.Add(message.Headers.DateSent);//Дата/Время
var span = document.querySelector('span[data-text="true"]');
span.focus();
span.dispatchEvent(new KeyboardEvent('keydown', { bubbles: true }));
span.dispatchEvent(new KeyboardEvent('keypress', { bubbles: true }));
span.dispatchEvent(new KeyboardEvent('keyup', { bubbles: true }));
span.innerHTML = ' Курица))';
span.dispatchEvent(new Event('input', { bubbles: true }));
span.dispatchEvent(new Event('change', { bubbles: true }));