Magento 2 not sending emails

Question

I'm having an issue with magento not sending any emails. I've already tested some solutions and it's not worked.

I'm using a SMTP extension and Magento 2.2.6: https://github.com/mageplaza/magento-2-smtp And always getting an error when testing the extensions configs:

Answer 1

I finally found a solution. My host provider (Digital Ocean) was blocking outgoing mails. I conctacted them and I was able to test successfully and send emails.