smtp server can send email but sharepoint 2016's workflow did not

hi every one...

i have a problem with sharepoint 2016 's workflow.

h configured the smtp as well as possible and it can send email to everyone.but sharepoint 2016 can not.

i created a workflow with sharepoint designer and it should send email to list Recipients.all of configurations are correct.incoming an outgoing email at CA have configured and i dont know what is my fault....

how can i solve it..please help me..

thank u so much