I use Mandrill mail driver for tests. I have a remote staging, that I seed after deploy. And during seeding I try to disable email sends, that are linked to certain events. Placing this in seeder:
openssl pkcs12 -in filename.pfx -nocerts -out key.pem
When converting and installing a public-key cryptography standards (PKCS) #7 certificate, which has .p7b file extension, to the Privacy Enhanced Mail (PEM) format by using the OpenSSL toolkit, the “unable to load PKCS7 object” error message is displayed.