Good afternoon.
It's not clear exactly how you should set it up.
The
info@zta.energy settings box is here
https://i.imgur.com/aPUvjHY.pngyou use imap and smtp like this mail.adm.tools
Box a.pхххххiy@zta.energy here others
https://i.imgur.com/Sbjb42L.pngyou use imap and smtp like mail.trion-ltd.com
The parser says that the error is here
https://i.imgur.com/fRn5deZ.pnghttps://i.imgur.com/09vE2K4.pngDNS has MX record mail.trion-ltd.com
mx zta.energy
Non-authoritative answer:
zta.energy mail exchanger = 20 mail.trion-ltd.com.
zta.energy mail exchanger = 15 mail.trion-ltd.com.
If you write correctly the connection settings to your mail server
(IMAP Host, IMAP Port, SMTP Host, SMTP Port, user/password, whether TLS is needed or not)
then everything will work.
In the integration settings, I recommend checking the box "Do not send emails from this mail if SMTP is not available"
The presence of this setting will exclude the possibility of sending letters bypassing the SMTP server.
Logs can be viewed here /admin/shop/report/logs/
imap-2021-02-26.log
sendmail-2021-02-26.log
Send method must be [5] => method: smtp
If using [5] => method: mail
So there are problems connecting to the SMTP server.