Most (gmail claims ~90%) email is encrypted with opportunistic TLS in transit and can't be passively monitored.
https://transparencyreport.google.com/safer-email/overview?h...
Further, "the provider could intercept email" and "the provider stores all email" are very very different.
What's going on there with the "Support for encryption in transit" section?
Overwhelmingly at 0% in most regions which they say are:
> domains in terms of volume of email to and from Gmail, in alphabetical order
Something doesn't add up there.
The table does not include the "green" domains by default, you have to select it.
You could still record every incoming and outgoing email as it goes through your server, couldn't you?
I really don't see the advantage of Helm.