If you get an email from an address like this FirstLast@invitation.sms.ac, don't even bother opening it. It is spam-scam crap.

It looked shady to me the first time I got one and as I have been getting more and more (and always from people on my MSN contact list) I decided to look into it. On one web page about it I found the following:

"Once you put your mobile number in to agree to send free SMS', they will deduct $3.00 from your mobile phone account for every 3 messages you receive through them. They then send you an sms every day containing advertising so that you are automatically billed for $3.00 every 3 days! For receiving adverts!"

This spam-scam has even been mentioned at ripoffreport.com. Read than you'll be suprised at how unethical sms.ac seems to be.

Also, some person by name of "Sean" has left what appears to be the exact same comment (cut & pasted?) in the followup threads of multiple blogs saying basically "Oh, if you'd just read the terms properly..." as well as insulting people who complain about sms.ac's spam-scam crap.

Not only that, but sms.ac has sent cease and desist letters to bloogers who had posted entries warning people about the spam-scam. Check the list of links below to see what others say about sms.ac.

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Whatever you do, do not sign up with sms.ac!