I've tried it anyway. Password ok, email account ok, both ports 465 ssl and 587 tls. I've tried with diferents smtl mail services, gmail, yahoo, hotmail and nothing works and shows this error (photo of the error attached on the end of this question)
The only smtp service works is the SMTP mail of my own hosting, the email that I creted on the hosting service, example firstname.lastname@example.org, but it only sends emails to my email accounts created on the hosting, my adm account is registered into a email of my own domínio in my service hosting, there the emails arrives perfectly but it don't working for accouts registered on other services email like Gmail, yahoo, etc. I've tested in differents versions of q2a, I've tested on other q2a website with new database and it doesn't work either.
I don't know what to do! I told my hosting service and them told me there's no blocking on their part I don't want to use email service other than smtp. It worked fine until a few weeks ago and I didn't make any changes, no plugins, nothing