gents, i am new to mailcow even never installed SSL certificated on linux, so i need your help.
i have bought SSL certificates from Sectigo, domain already verified and they send me 4 files (see screenshot)
![](https://community.mailcow.email/assets/files/2024-06-20/1718873105-66038-image.png)
my question is what files in which chain need to installed in mailcow?
currently i checked on https://www.hardenize.com/report/mail.umirzak.kz/1718801410#email_certs and see that certificate incorrecly installed.
as i understand i need to use below commands to convert and install certificates
openssl x509 -in mail.domain.ru.crt -out mail.domain.ru.pem - in this command I don’t know which *.crt file need to be used from above screenshot
openssl rsa -in mail.domain.ru.key -out mail.domain.key.pem
cp /home/user/share/mail.domain.ru.pem /opt/mailcow-dockerized/data/assets/ssl/cert.pem
cp /home/user/share/mail.domain.key.pem /opt/mailcow-dockerized/data/assets/ssl/key.pem
as i understand i need to use below commands to convert and install certificates
openssl x509 -in mail.domain.ru.crt -out mail.domain.ru.pem - in this command I don’t know which *.crt file need to be used from above screenshot
openssl rsa -in mail.domain.ru.key -out mail.domain.key.pem
cp /home/user/share/mail.domain.ru.pem /opt/mailcow-dockerized/data/assets/ssl/cert.pem
cp /home/user/share/mail.domain.key.pem /opt/mailcow-dockerized/data/assets/ssl/key.pem