I have a software, that generates signed "eml" file with attachment.

Like: 

Content-Type: application/x-pkcs7-mime;
	smime-type=signed-data;
	name="smime.p7m"
Content-Transfer-Encoding: base64
Content-Dis;
	filename="smime.p7m"
MIIFTgYJKoZIhvcNAQcCoIIFPzCCBTsCAQExCzAJBgUrDgMCGgUAMIHGBgkqhkiG
...

What is the easiest way to send it?

I use gmail account and gmail smtp, the "From" field of the "eml" is my gmail address.

I have Outlook 2013 on win8x64.

• Edited by n43jlkin 15 hours 25 minutes ago

Hi,

Do you want to send out the "eml" file automatically? If this is the case, I'm afraid Outlook doesn't have a build-in functionality to achieve the goal. I'd recommend you post a new question in the following forum to check this can be done via coding:

https://social.technet.microsoft.com/Forums/scriptcenter/en-US/home?forum=ITCG

Best Regards,

Steve Fan
TechNet Community Support