trouble with sending encrypted email via php

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PHP

encryption

email

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i'm trying to encrypt a email message using a x509 certificate and decrypt it using ms outlook. the message sends but it shows encrypted text. i already loaded the p12 into outlook.

what can i do differently so it shows the decrypted message?

these are the files im using, php and x509 and p12
enc-emailer.zip


i used commands like these to make the certs

make 509
openssl req -new -x509 -keyout private/cakey.pem -out cacert.pem -days 365 -config openssl.cnf


convert to pk12
openssl pkcs12 -export -in my.crt -inkey my.key -out my.p12