F5 Device SMTP Server Config and TLS

Hi,

I'm trying to configure the SMTP server within Device -> Configuration -> SMTP but apparently it wants to communicate via TLSv1 which is an issue as the mail relay server that I have to use only allows TLSv1.2, obviously. Is there any variables that can be changed to make this connection want to use TLSv1.2 rather than TLSv1?

Thanks in advance on any guidance!