diff --git a/cmd/certspotter/main.go b/cmd/certspotter/main.go
index 9730789..f2eb081 100644
--- a/cmd/certspotter/main.go
+++ b/cmd/certspotter/main.go
@@ -163,6 +163,7 @@ func main() {
 		logs        string
 		noSave      bool
 		script      string
+		sendmail    string
 		startAtEnd  bool
 		stateDir    string
 		stdout      bool
@@ -176,6 +177,7 @@ func main() {
 	flag.StringVar(&flags.logs, "logs", defaultLogList, "File path or URL of JSON list of logs to monitor")
 	flag.BoolVar(&flags.noSave, "no_save", false, "Do not save a copy of matching certificates in state directory")
 	flag.StringVar(&flags.script, "script", "", "Program to execute when a matching certificate is discovered")
+	flag.StringVar(&flags.sendmail, "sendmail", "/usr/sbin/sendmail", "Path to the sendmail-compatible program to use")
 	flag.BoolVar(&flags.startAtEnd, "start_at_end", false, "Start monitoring logs from the end rather than the beginning (saves considerable bandwidth)")
 	flag.StringVar(&flags.stateDir, "state_dir", defaultStateDir(), "Directory for storing log position and discovered certificates")
 	flag.BoolVar(&flags.stdout, "stdout", false, "Write matching certificates to stdout")
@@ -201,6 +203,7 @@ func main() {
 		Verbose:             flags.verbose,
 		Script:              flags.script,
 		ScriptDir:           defaultScriptDir(),
+		SendmailPath:        flags.sendmail,
 		Email:               flags.email,
 		Stdout:              flags.stdout,
 		HealthCheckInterval: flags.healthcheck,
diff --git a/monitor/config.go b/monitor/config.go
index 1e0d60c..d1bc430 100644
--- a/monitor/config.go
+++ b/monitor/config.go
@@ -20,6 +20,7 @@ type Config struct {
 	WatchList           WatchList
 	Verbose             bool
 	SaveCerts           bool
+	SendmailPath        string
 	Script              string
 	ScriptDir           string
 	Email               []string
diff --git a/monitor/notify.go b/monitor/notify.go
index 8fc6d09..86cabca 100644
--- a/monitor/notify.go
+++ b/monitor/notify.go
@@ -36,7 +36,7 @@ func notify(ctx context.Context, config *Config, notif notification) error {
 	}
 
 	if len(config.Email) > 0 {
-		if err := sendEmail(ctx, config.Email, notif); err != nil {
+		if err := sendEmail(ctx, config.SendmailPath, config.Email, notif); err != nil {
 			return err
 		}
 	}
@@ -62,7 +62,7 @@ func writeToStdout(notif notification) {
 	os.Stdout.WriteString(notif.Text() + "\n")
 }
 
-func sendEmail(ctx context.Context, to []string, notif notification) error {
+func sendEmail(ctx context.Context, sendmailPath string, to []string, notif notification) error {
 	stdin := new(bytes.Buffer)
 	stderr := new(bytes.Buffer)
 
@@ -77,7 +77,7 @@ func sendEmail(ctx context.Context, to []string, notif notification) error {
 	args := []string{"-i", "--"}
 	args = append(args, to...)
 
-	sendmail := exec.CommandContext(ctx, "/usr/sbin/sendmail", args...)
+	sendmail := exec.CommandContext(ctx, sendmailPath, args...)
 	sendmail.Stdin = stdin
 	sendmail.Stderr = stderr