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Signed But Unencrypted Messages Not Viewable in Browser Email Cients

If I sign and send an unencrypted email to a browser based email client e.g. Hotmail or Office 365 the body does not get displayed in the client.

However in Office 365 it says the message cannot be displayed because “S/MIME isn’t supported in this view” and it gives you the option to view it in a pop up where you can see the email body.

Other emails clients such as Hotmail don’t give you the option to see the email in a S/MIME capable pop up so you can’t see the body.

A Google search says that browser based email clients don’t support S/MIME.

Is there a solution so that signed unencrypted emails are viewable?

Hi Martin,


Thank you for posting your inquiry.

Your requirement seems relevant to one of the issues we already have logged as EMAILNET-34874. It is under investigation by our product team and there is no feedback available at present about this. We have linked this thread with the logged ticket so that once there is some information available about this issue, we shall notify you here.

Hi, any news on EMAILNET-34874?

Hi Martin,


Our product team is working to fix the problem. It got late due to some complications involved and in under investigation at present for a fix. We are trying to include the fix in the upcoming version and will update you here once there is some information available.


The issues you have found earlier (filed as EMAILNET-34874) have been fixed in this update.


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