Does your mailserver use an encrypted connection (STARTTLS) to send mails to our server? Just send an empty email to the address below and check the result.
TLSv1.3
/
TLS_AES_256_GCM_SHA384
mail.ibs-engineering.cz
(89.203.210.252
)
TLSv1.2
/
ECDHE-RSA-AES256-GCM-SHA384
mail3.banquebcp.lu
(195.46.226.220
)