diff --git a/data/tooltips.txt b/data/tooltips.txt
index e15c1468..dac256d1 100644
--- a/data/tooltips.txt
+++ b/data/tooltips.txt
@@ -12,6 +12,7 @@ imap_server = Server address used for receiving email, leave empty to disable IM
 smtp_port = SMTP port used on the SMTP server for sending email. Typically port 587 is used for TLS and port 465 is used for SSL
 ssl_enabled = Use SSL encryption to send emails
 tls_disable = If SSL is disabled TLS encryption is the default, unless this is enabled. If enabled and SSL is disabled, no encryption will be used to send email.
+smtpauth_disable = If enabled, ignore SMTP authentication. Typically only used for locally administered SMTP servers
 sitename = Site Name
 port = Serial device name of your serial port. Normally  /dev/serial0 or /dev/ttyAMA0 for onboard Raspberry Pi Serial ports
 incoming_mail_folder = The name of the folder in the mailbox for searching for incoming email commands