Hello.
Today I decided to try out S/MIME in Grommunio.
I use Amazon SES for my email relay service.
I created the correct PKS key using openssl with the recipient email address. Under settings in the webUI, I upload the s/mime certs, and they show up within the area listing public & private key pair.
I first wanted to send an email to the recipient a signed email, that way, the recipient can import my public key.
But, Amazon is complaining about Duplicate header 'MIME-Version'.
I've search around on the Internet, but most results are to change a config file in your emailer.
This is when Amazon sends back when I try to sign an email with the certs I created.
I create a cert with the recipients email address, and that show up correctly under Settings S/MIME section. I can see public & private keys there.
Is there a setting in Grommunio I can set to disable duplicate headers? From what I gather, it seems Amazon SES is the major complainer of duplicate headers.
user.name@example.com: host
email-smtp.ca-central-1.amazonaws.com[3.97.124.168] said: 554 Transaction
failed: Duplicate header 'MIME-Version'. (in reply to end of DATA command)