I was about asking why you deleted the op, changed it to 'removed' and now it is back up again, but i found my answer in your edited op:
Please note that we recently suspended the entire service 😔.
We had an attack 😓, but the issues have been resolved.
Sorry, can you share with us what kind of attack it was, and what measures you have taken to ensure such a thing does not happen again. It takes time to build customer trust, but it would be faster if there are no issues such as this. Welcome again.
Especially to a newly-launched exchange, transparency is very important. That's a matter of integrity. To just say you were under attack but it has since been contained keeps the users guessing. That's treating them poorly. It's as if you don't owe your users any explanation at all. It might be a small thing to you but it's a big thing to those who've entrusted their money on your platform.
Users are left hanging as to what really happened. They're confused. And it makes them question how solid your security is, as to whether their funds are secure under your custody.
The main mailbox we use, we have decided to close the topic to avoid a major problem and take the domain offline.
We contacted the email provider and retrieved the mailbox.
Regarding the data, no theft was committed.