There are a lot of subject lines like:
Re: overdue payment
I've been trying to get you on the phone
Hey, we talked last week
ALL of these are illegal come ons as they use deceptive trade practices.
I also recently got one (purportedly from ebay):
Your eBay account has been suspended
(inside it says how some suspicious activity has been noticed on your account and so it "has" been frozen pending further communication...).
Just as there is a "postal inspector", someone in the Federal Trade Commission should be positioned over email fraud complaints. It is ILLEGAL to send porn ads to minors, period. In the postal realm, it is illegal to send porn ads to someone who has not approved such mail.
This is technically fraud over wires (phones/telegraph/etc.) and does fall under government oversight.
There has been no will to do anything about this issue for 20 years. The telemarketers lobby congress well.
I got one from Citi Bank last week asking me to verify my credit card info. The scary part is how did they know I have a Citi Bank credit card?