Club 1269860 Email forwarding Problem with Gravatate Collaborative Platform

I would love to give you the IP from an email except I don't believe that GSuite gives me
direct access to the details of the email header. If so, it's beyond my skill set.

I tried decomposing the HTML of the GMail interface in Chrome but that seemed to no avail.

Guidance? Tricks?

BTW: I was referred to www.checktls.com/TestReceiver upstream in this conversation.
If you might find it helpful, check this link for recent results:
TLS Email To: results They don't look good but I'm not sure how to interpret them.

K

in gmail use the "Show Orginal" from the more ...

Is this it?

From: Gravatate <26c53af5-200c-447b-aec7-585142795d6f_ch@automail.gravatate.com>
Sender: Gravatate <26c53af5-200c-447b-aec7-585142795d6f_ch@gravatate.com>
Subject: Rosemarie Savino sent a Chat Message
Received: from [34.207.72.55] by mandrillapp.com id 9e7b4d45175a4a9588e620faf4c3f347; Thu, 25 Jul 2019 15:40:52 +0000
To: Ken Portnoy <kenneth.r.portnoy@iname.com>

Link to the whole thing HERE

We are not blocking that IP address. I see no reason if the email addresses are spelt correctly that the email is not received by FTH.

Finally, it starts getting interesting! It's a puzzlement.

Messages with sender information like this from Gravatate fly to me through FTH:

Sender: confirm@gravatate.com
Errors-To: confirm@gravatate.com
Reply-To: confirm@gravatate.com

Messages with sender information like this disappear enroute to me

From: Gravatate <a71bb4dd-e833-461b-af58-7d56d28bcd0f_ch@automail.gravatate.com>
Sender: Gravatate <a71bb4dd-e833-461b-af58-7d56d28bcd0f_ch@gravatate.com>
Received: from [34.207.72.55] by mandrillapp.com id a4c79548cd214ba3a82b39b19323fe05; Sun, 04 Aug 2019 14:43:46 +0000

I got this latter example from a message that was sent by Gravatate to me at a non-FTH email address. Admittedly I'm assuming messages to FTH would look the same. I can verify that if needs be. It's a reasonable but often dubious assumption.

This is happening despite automail.gravatate.com being whitelisted by me.

FTH has SPAM filtration beyond IP blocking and blacklisting. I understand there are rules-based processes for identifying nefarious stuff based on email arcana.

My current working hypothesis remains that FTH, most likely in SPAM filtration, is involved with the disappearance of the missing messages.

The only information contrary to this hypothesis is the prior representation that messages matching the dates/times on my previously provided list of outgoing mesages from Gravatate are not being seen in your logs. Which comes first, the logs or the spam filters? If I were protecting against (DOS attacks), filtration would come first.

Enjoy!