There is no 100% reliable way to determine that a received SMS message is a reply to a previously sent message. The SMS system does not provide this information.
The only way to match a received SMS message to a previously sent message is to keep a list of sent messages and simply presume that a received SMS message is a reply when the sender matches one of the numbers in the list. The Email Connector and the Web Connector in Diafaan SMS Server uses this method to forward SMS replies to a specific email address or user name.
is there a way to know who answered the sended sms
I have multiple senders and when they replay the sms I want to know from witch message they replay
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