This post is reminder that you should always confirm that an email you received from your casino is actually from your casino.
Not just from a casino but from all the emails that you received that you are not familiar with or did not have a communication with, if you are not subscribed to a newsletter or you did not opt in, then the email can be considered spam.
1. Verify that an email from your casino was actually sent from them through asking here on the forum or via any other means where they are active.
I definitely will if the email comes from a Gmail pretending to be the casino you are playing at.
3. This highlights the importance of having an active and responsive support team from the casino.
Service or product providers should have a support community to address all issues pertaining to their products or services.