ERROR CODE 3 message

Hi
What is error code 3
It doesnt allow me to send email from yandex

Also can you check security as it seems to me my new email already been hacked and remotedly manipulated by third party.

Thanks
Veronika
MaidennameSzekeres@yandex.com

hi
i have linked frappe erpnext with many accounts for our company … no problems shows
can you please share the problem with a GIF or picture step by step … or how did you produce it …