Detection of Spam from the dataset of SMS extracted from Grumbletext Website The SMS Spam Collection is a set of SMS tagged messages that have been collected for SMS Spam research. It contains one set of SMS messages in English of 5,574 messages, tagged acording being ham (legitimate) or spam. Using Tf-Idf Transformer for weighing the counts and Naive Bayes' Classifier detected the Spam and got F1 score of 0.96,precision of 0.97 and recall of 0.96.