Sqmail ust hk

It seems like you're trying to communicate something in a concise manner. Here's my attempt to decipher the message:

"Sqmail" could be a typo or a shortened form of "Square Mail" or "Secure Mail".

"Ust" might be a shortened form of "Used" or "Used to".

"Hk" could be a shortened form of "Hong Kong" or a code for a specific location.

Putting it all together, I'm going to take a wild guess that you might be asking about a secure mail service used in Hong Kong? If that's not correct, please feel free to provide more context or clarify your question!