Overview
Google analyzes incoming messages to identify them as spam or suspicious. Sometimes legitimate messages, like messages from Zoom or Echo360, end up in the Gmail Spam folder. If you find a legitimate email in your Gmail Spam folder, we have a couple of recommendations:
Mark Incorrectly Classified Messages as Not Spam
Gmail uses machine learning to understand your preferences better and to recognize spam. When you manually mark a message as not spam, Gmail learns how to manage messages addressed to you.
Add Trusted Senders to Your Contacts List
You can manage your personal contacts list in Gmail. When you add an email address to your contacts list, Gmail won't mark messages from these address as spam.
Mark a Message as Spam
You can mark or unmark emails as spam. Gmail also automatically identifies spam and other suspicious emails and sends them to Spam. For more details, visit Google's Mark or unmark Spam in Gmail article.