SMTP server doen't support STARTTLS

Hello Osama,
please try changing your server security policy on all the included tabs to the (legacy) option.
Save, click refresh and see if the issue persists.

The same occured for me too… Even changing the security policy didnt work… Please help

Hello John,

Please go to Menu -> Tools -> Accounts, select the problematic account, go to the SMTP tab and make sure the ‘Port’ number is 465 and ‘Security Policy’ is set to ‘Use SSL/TLS on special port (legacy)’

That should resolve the issue.


For me it didn’t help, unfortunately

Hello Jelena,

Could we please ask for more details about your issue? What exactly do you have trouble with? Do you get an error message? 1) If you are getting an error message, please enclose a screenshot of the error. 2) Tell us what release number of the program do you use (you can find this information under Help - About).

Thank you,