SMTP Error: data not accepted.

Replies: 0

I am using the plugin in Woocommerce configured with smtp from Yandex.com.

Force From Email: disabled
Force From Name: disabled

smtp.yandex.com
TLS
580
Authentication: Enabled

username and password: checked several times.

On the first day it worked perfectly, however, after a few hours without any settings having been changed I stopped receiving the emails of new purchase and status change.

I have a form on the website using contact form 7 that continues to send normally.

I try to perform a test send from WP Mail SMTP and SMTP Error: data not accepted.