How to enable SMIME to READ emails

Question

I've been getting emails from some friends, that have this SMIME.p7s attachment on them.  mail.app just won't even open, it just trys to load it and nothing happens.  when I go to my WEBMAIL, I can see the email and that there is this SMIME.p7s attachment, but at least I can read the email in a web browser.
How can I enable mail app to read these natively?
BTW, SEARCH on the forums is REALLY poor now, simply nothing of use comes up regardless of query and search terms

Answer 1

Well, I've used Paragon NTFS, but if you don't want to use 3rd party software, you should do this AT YOUR OWN RISK:
Open Terminal.app (/Applications/Utilities/Terminal)
Type "diskutil info /Volumes/volume_name" and copy the Volume UUID (bunch of numbers).
Backup /etc/fstab if you have it, shouldn't be there in a default install.
Type "sudo nano /etc/fstab".
Type in "UUID=paste_the_uuid_here none ntfs rw" or "LABEL=volume_name none ntfs rw" (if you don't have UUID for the disk).
Repeat for other NTFS partitions.
Save the file (ctrl-x then y) and restart your system.
After reboot, NTFS partitions should natively have read and write support. This works in both 32 and 64-bit kernels. Support is quite good and fast, it even recognizes file attributes such as hidden files.
Good luck!