What to do:
Be suspicious of any email in general, and of all links and attachments in email.Don’t open email from people you don’t know, and never open an attachment unless you’re expecting it.
Why do it?
A bad link or attachment can cause your device to be infected with malware, a virus, or ransomware.
Examine email sent to you: what email address it was sent from; and if there’s any typos in the email address. Are you addressed by name, or by Sir/Madam, or by email address (most suspicious). Are there uncharacteristic grammatical errors?
Did you expect this email? Malicious links and files may come from friends who have been infected too.
The only safe attachment to open is .txt