openssl req -new -newkey rsa:1024 -nodes -keyout mailserver.key -days 3650 -x509 -out mailserver.crt
openssl x509 -outform der -in mailserver.crt -out handy.crt
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openssl req -new -newkey rsa:1024 -nodes -keyout mailserver.key -days 3650 -x509 -out mailserver.crt
openssl x509 -outform der -in mailserver.crt -out handy.crt