Sounds just like normal spam type frauds, fakes, and other malware deliveries.
etc Get thousands of them would'nt worry about them?
If you’re are as a starter
In g mail
Account Security:
Settings -> Accounts and Import -> Google Account Settings -> Change Password [pick a new secure password]
Settings -> Accounts and Import -> Google Account Settings -> Change Password Recovery Options [verify secret question, SMS and secondary e-mail address]
Potential Spam:
Settings -> General -> Signature [make sure nothing as been added]
Settings -> General -> Vacation Responder [make sure it's disabled and empty]
E-mail Theft
Settings -> Accounts and Import -> Send Mail As [make sure it is using your correct e-mail address]
Settings -> Filters [no filters that forward or delete e-mail]
Settings -> Forwarding and POP/IMAP -> Forwarding [disabled or correct address]
Settings -> Forwarding and POP/IMAP -> POP Download [disabled]
Settings -> Forwarding and POP/IMAP -> IMAP Access [disabled]
With regard why it comes from a domain you own there is multitude of software out there that looks for remotest link between people, domains, servers, host etc in an attempt to lull you into a false sense of security? Bit like the phone scams that tell you there is a payment waiting for a car accident please call this that number, % wise as many people have had accidents in cars there likely to get lucky every now and then ?
Its not a problem with drop box per say more phishing scam whereby recipient clicks on link and downloads the malware etc Just to add don’t click on the link
