Clients are replying to my emails in an ongoing thread and I am not receiving them

Here's some more information: Full headers from an email that was sent to me and did not arrive, but said it was sent and did not bounce on the sender's end:

MIME-Version: 1.0 Date: Tue, 7 Jun 2022 14:46:19 -0400 Message-ID: <CAFioafdNgW=23S6T1H4K5XxxRTpeUqMUroAs8hMb=XXXXXXXXXXX> Subject: Test 2 From: "XXXXXXXX" <XXXXXXXXX> To: Sirie XXXXXXXX <XXXXXXXXXXX> Content-Type: multipart/alternative; boundary="0000000000001d574b05e0e001ec" --0000000000001d574b05e0e001ec Content-Type: text/plain; charset="UTF-8" more test --0000000000001d574b05e0e001ec Content-Type: text/html; charset="UTF-8" <div dir="ltr">more test</div>

Please help! Thanks!

First, please confirm this is related to a personal Gmail address or a Google Workspace domain. 

 

Can you include details of the browser, mobile app or the email client where you see this?

 

Check if any of the browser extensions, add-ons, apps, sites, or software programs specifically with access to that Google Account is causing this.

Thanks for the reply Somnath! Yes this is related to a personal Gmail address and a Google Workspace domain. I have a main Gmail address where my Google Workspace domain email is forwarded along with another Gmail address. Never had a problem before and have been using it this way for several years. I'm using Firefox and web-based Gmail. I have not made any recent changes to browser extensions, add-ons, apps, sites, or software programs specifically with access to that Google Account. Is there a way I can check this? Does it make sense that this could cause emails within ongoing threads to get lost? Thanks for your help!

-- So, does this happen only with emails sent to your Google Workspace account? If it does were you able to check using ELS (https://support.google.com/a/answer/2618874?hl=en) if the message was received in the intended address but simply not forwarded to your personal Gmail address? 

Forwarding is often dependent on https://support.google.com/mail/answer/175365?hl=en for personal Gmail accounts. So, please check if any of the details apply.

Hi Somnath,

You are correct! Some emails are hitting the intended address and NOT being forwarded. It's only a small portion of the emails and as mentioned, weirdly, it happens to emails in an ongoing thread. Any idea how I can figure out why those particular emails are not being forwarded, and how I can sort to find all those that have not been forwarded so I don't have to go through months of emails and compare them to those forwarded to my personal account?

Thanks!

Let me know. If need be, I can move this thread over to the specialized Google Workspace Admin help forum.