Signed-by doesn't show up.

I don't know why, but the "Signed-by" does not show for one of my delivery server, while it is showing for the main system delivery server.

It looks like the settings for both delivery servers are the same. Also DKIM seems to be alright.

What's the solution?
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Any idea?

Testing a few things and that's an absolute nightmare!

Now Images do not show in Gmail and sometimes there is this "?" with a notice saying "Google can not verify that it is sent from the domain"

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Staff member
I don't have that many advices for this, but I'd say you have to double check your emails because if google does not show you the right auth info it means the auth is not properly done most of the cases.