Content-Type' found without required MIME headers

Jason Thompson

New Member
Hi, for some reason when i do a mail test on mail-tester its coming back saying no MIME headers found.

This is the error message

1599024725511.png
Then when i view source code of my clients sending emails using mailwizz it shows the MIME header in their sending, but for some reason not mine.

For example on my clients sending it shows like this: MIME-Version: 1.0

1599033746049.png

But on my sending it shows like this:

1599025116502.png

So my question is why is MIME header showing on my clients sending and not mine? I'm pretty sure its affecting my email deliverability.
 

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Last edited:

ghimes

Member
Staff member Support Staff
Hello,
Mailwizz is adding that header for sure in all the possible cases. What is happening after the email is handled to the delivery server is out of Mailwizz control. The delivery server provider settings is the place to look.

Cosmin
 
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