SMTP problem

Today i have problem with SMTP SSL port in MS outlook, mails wait 5 minutes to get pass or mails wont be send

the error code is: 0x80042109

domain is diem.si

something is wrong with your smt, plese check:
https://mxtoolbox.com/SuperTool.aspx?action=smtp%3azoho.smtp.eu&run=toolpage

thanks for help