Can you add for your service subj? It is absolutely free for me and all senders.
People can send sms via e-mail or via Internet page.
address - firstname.lastname@example.org
subject - telephone number with city code, without country code, only digits.
body - message, not more 120 latin or digital symbols, plain text (not html, not attachment).
Via Internet page:
address and action of form: http://www.pcom.ru/online.phtml
Message not more 120 latin or digital symbols
People can send messages by cirillyc simbols, but only 80 symbols.
I receive only messages without ip-addres, e-mail or somethink more about senders.
I'm free for testing, but my english is bad and I have not lot of Internet connections.