The key difference between an iMessage and an SMS message is the colour of the text. An iMessage text appears in a blue bubble, and an SMS text message appears in a green bubble.
If a suspicious message appears in green, you may need to
If you get an iMessage from someone who's not saved in your contacts, you'll see a message stating that the sender is not in your contact list, and you'll have the option to
Report junk
.
Select the
Report junk
link to forward the sender's information and the message to Apple.
Email Apple to report spam or junk
If you don't have iOS 8.3 or later, you can send an email to imessage.spam@apple.com with this information: