⚠️ Spammers from a site called SocialDB.xyz seem to be flooding Mastodon members with emails claiming to offer sponsorship opportunities (which is dubious to say the least).
It's probably best to just ignore these emails, report them as spam and do not click on any of their links.
They seem to be getting email addresses from websites mentioned in Mastodon profiles, if the site has a public email address. The spam assumes the linked site belongs to the account owner.