diff --git a/main.go b/main.go
index 77a36b4..da522a3 100644
--- a/main.go
+++ b/main.go
@@ -48,19 +48,27 @@ func main() {
 		logger.Fatal("No JIRA Instance provided. Please set the URL of the JIRA instance by -url parameter.")
 	}
 
+	jiraClient, err := getJIRAClient(*jiraURL, *jiraUsername, *jiraPassword)
+	if err != nil {
+		logger.Fatal(err)
+	}
+
+	projects, err := getProjectsFromJIRA(jiraClient)
+	if err != nil {
+		logger.Fatal(err)
+	}
+	if len(projects) == 0 {
+		logger.Fatal("0 projects retrieved from JIRA. Without projects, we are not able to operate.")
+	}
+
 	issueText := getTextToAnalyze(*issueMessage, *inputStdin)
-	issues := getIssuesOutOfMessage(issueText)
+	issues := getIssuesOutOfMessage(projects, issueText)
 
 	// If we don`t get any issues, exit
 	if len(issues) == 0 {
 		logger.Fatalf("No JIRA-Issue(s) found in text '%s'.", issueText)
 	}
 
-	jiraClient, err := getJIRAClient(*jiraURL, *jiraUsername, *jiraPassword)
-	if err != nil {
-		logger.Fatal(err)
-	}
-
 	// Loop over all issues and check if they are correct / valid
 	for _, issueFromUser := range issues {
 		err := checkIfIssue(issueFromUser, jiraClient)
@@ -84,9 +92,13 @@ func main() {
 //
 // @link https://confluence.atlassian.com/display/STASHKB/Integrating+with+custom+JIRA+issue+key
 // @link https://answers.atlassian.com/questions/325865/regex-pattern-to-match-jira-issue-key
-func getIssuesOutOfMessage(message string) []string {
+func getIssuesOutOfMessage(projects []string, message string) []string {
 	var issues []string
-	re := regexp.MustCompile("(?i)([A-Z]+)-(\\d+)")
+
+	projectList := strings.Join(projects, "|")
+	expression := fmt.Sprintf("(?i)(%s)-(\\d+)", projectList)
+
+	re := regexp.MustCompile(expression)
 
 	parts := re.FindAllStringSubmatch(message, -1)
 	for _, v := range parts {
@@ -163,3 +175,17 @@ func getTextToAnalyze(argText string, inputStdin bool) string {
 
 	return text
 }
+
+func getProjectsFromJIRA(jiraClient *jira.Client) ([]string, error) {
+	list, _, err := jiraClient.Project.GetList()
+	if err != nil {
+		return []string{}, err
+	}
+
+	projects := []string{}
+	for _, p := range *list {
+		projects = append(projects, p.Key)
+	}
+
+	return projects, nil
+}
diff --git a/main_test.go b/main_test.go
index 07be501..6c790ca 100644
--- a/main_test.go
+++ b/main_test.go
@@ -56,20 +56,21 @@ func TestGetJIRAClient_IssueNotExists(t *testing.T) {
 
 func TestGetIssuesOutOfMessage(t *testing.T) {
 	dataProvider := []struct {
-		Message string
-		Result  []string
+		Message  string
+		Projects []string
+		Result   []string
 	}{
-		{"WEB-22861 remove authentication prod build for now", []string{"WEB-22861"}},
-		{"[WEB-22861] remove authentication prod build for now", []string{"WEB-22861"}},
-		{"WEB-4711 SYS-1234 PRD-5678 remove authentication prod build for now", []string{"WEB-4711", "SYS-1234", "PRD-5678"}},
-		{"[SCC-27] Replace deprecated autoloader strategy PSR-0 with PSR-4", []string{"SCC-27", "PSR-4"}},
-		{"WeB-4711 sys-1234 PRD-5678 remove authentication prod build for now", []string{"WeB-4711", "sys-1234", "PRD-5678"}},
-		{"TASKLESS: Removes duplicated comment code.", nil},
-		{"This is a commit message and we applied the PHP standard PSR-0 to the codebase", nil},
+		{"WEB-22861 remove authentication prod build for now", []string{"WEB"}, []string{"WEB-22861"}},
+		{"[WEB-22861] remove authentication prod build for now", []string{"WEB"}, []string{"WEB-22861"}},
+		{"WEB-4711 SYS-1234 PRD-5678 remove authentication prod build for now", []string{"WEB", "SYS", "PRD"}, []string{"WEB-4711", "SYS-1234", "PRD-5678"}},
+		{"[SCC-27] Replace deprecated autoloader strategy PSR-0 with PSR-4", []string{"SCC"}, []string{"SCC-27"}},
+		{"WeB-4711 sys-1234 PRD-5678 remove authentication prod build for now", []string{"WEB", "SYS", "PRD"}, []string{"WeB-4711", "sys-1234", "PRD-5678"}},
+		{"TASKLESS: Removes duplicated comment code.", []string{"WEB"}, nil},
+		{"This is a commit message and we applied the PHP standard PSR-0 to the codebase", []string{"WEB"}, nil},
 	}
 
 	for _, data := range dataProvider {
-		res := getIssuesOutOfMessage(data.Message)
+		res := getIssuesOutOfMessage(data.Projects, data.Message)
 		if reflect.DeepEqual(data.Result, res) == false {
 			t.Errorf("Test failed, expected: '%+v' (%d), got: '%+v' (%d)", data.Result, len(data.Result), res, len(res))
 		}