Janthina snail mail ntust

It seems like you're trying to communicate something, but the text is a bit jumbled. Here's my attempt to decipher it:

"Janthina snail mail not us"

Is that correct? If so, it seems like you're saying that Janthina (perhaps a person or a company?) is not sending you snail mail or is not using a particular service. Could you please provide more context or clarify what you mean? I'm here to help!