They all use the official government site and it doesn’t give out the stresses. You have to put your message on a form and it is submitted to them.In order yo get to the form, you have to fill out info to show you are from their district or state. On dome of them, they don’t even let you put in your own subject line ( Lindsey Graham). It has a selection that you have to choose from. Yhrn they just send you back a general gorm letter filled in with the fields you entered at the beginning. They never address the specifics you mention in your letter, which means they never read it
Although, Congress staffers will answer the phone.