admin
Spam? Sorry, but messages were sent to my 2-3 addresses to test the system. The thing is that I have hosting for a telegram bot, but there is no way to send email messages; I need to send a request to confirm email address. You provide very convenient hosting, I created a small PHP file that receives an address and, in fact, a confirmation link through a post. I sent several test messages and then my account was blocked. It's a pity.
Although, in any case, I believe that you reacted quite quickly. I think you did the right thing, it really looked a little suspicious.