Email sending do not work

[BrentW]

Have you checked if there's a newer firmware available? This issue might also be caused by an old SSL library.

Unfortunately I'm bound by the rather slow release of firmware for the clipsal/schneider Shac/Nac product line.
Their firmware number is 1.6.0 but I don't know how that relates to the LM firmware number.
The last update was issued in August 2018!!!!! I'm made a few enquiries to them on this issue don't worry.

Can you explain the wantread result? 
If I was to get the facility to create a certificate for the NAC under their domain would that improve the SSL issue if it exists?
Seeing as the Gmail work around is to enable less trustworthy devices this might be where the conflict lies in the process?

Brent