void btnDeleteUnVerified_Click(object sender, EventArgs e)
{
int daysOld = 90;
int.TryParse(txtDaysOld.Text, out daysOld);
DateTime cutOffDate = DateTime.UtcNow;
if (daysOld > 0)
{
cutOffDate = DateTime.UtcNow.AddDays(-daysOld);
}
subscriptions.DeleteUnverified(letterInfoGuid, cutOffDate);
WebUtils.SetupRedirect(this, SiteRoot + "/eletter/LetterSubscribers.aspx?l=" + letterInfoGuid.ToString());
}