Generate CSR (Certificate Signing Request)

openssl req -new -newkey rsa:2048 -nodes -keyout medjava.ro.key -out medjava.ro.csr

Send mail with attachments

mail -s "CSR Files" -a phab.ro.csr -a nocloud.ro.csr odefta@medjava.ro < message.txt

* CSR Files is the subject
* message.txt contains the body message
* phab.ro.csr and nocloud.ro.csr are the attachments