Marc Stridgen

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

Fair 😄 

Not for this feature no, as its not related to banning in any way

The initiation method isn’t the most important part. The optimization methods apply to all of them. 
Looking at the screenshots, your system mails go out directly from your server. So you need to make sure your DNS settings are optimized for that as well, not just for the external services like ConvertKit you use. In fact, it could be that adding DNS settings for those external service actually deligitimized sending mails from your own server. You need to make sure that all sending options are included in your DNS settings. 
You can check with your host. They probably have settings and information directly relating to SPF/DKIM/DMARC …
I always optimize this stuff using the Mail Tester website. By the way: You can do 3 tests for free per day. You should end up with at least of score of 9. 

I had the same issue recently. I received errors that Gmail rejected my emails because they did not pass DKIM/SPF.
Switching from the PHP mail method to SMTP increased my score on https://www.mail-tester.com/ and the emails started being delivered again.

You most likely have your board's Reply-To address set to an email address that sends an auto-reply.  
So if IPB sends an email which bounces, the bounce comes back to your inbox which gets the auto-reply, which then triggers a separate bounce.

Sorry Marc, my comment was a little tongue in cheek. 🙂 
However, Google also uses Passkey now.

I have created a ticket on this for you. I understand you cannot receive those on your current email address. Do you have another email you can add as an alternative contact on your account? If so, can you please do that and then send me a PM with that email address. I will then copy you in on the ticket

Ive tagged developers on this one for you, so we can see why this would be the case. 

It sends email from whatever you have set up in system->Settings->Email on your admin CP. It would indeed be that which would need to be set up correctly, and you would need to contact whoever sends the mail for that email address

Thank you for your reply and about the Mail Tester website!
I'll ask my host right away and test once the DNS settings are correct. 🙂
 

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

Yeah it does feel that way.
 
Thanks for your help.

Glad to hear things are working for you. I suspect this is more likely an issue on the side of your email, given what you are describing

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

We have released a patch to address this issue. Please go to AdminCP > System > Support and apply the patch from the first/top left box. If you do not see an option to install the patch, you already have the latest release.

@Clover13 To reproduce the bug, the database must have the Store revisions option enabled. Most likely the test was made on a database with it disabled.
I initially thought too the error was coming from saving the record to the database, only after re-checking your last screenshot I noticed it was a revision instead. 😅

You will want to manually upgrade
Check your server meets the current requirements using the requirement checker. You will need to update to php 8.1 at least -
  Upload a fresh set of files from your client area, overwriting any files which already exist. 
  Run the upgrader from /admin/upgrade and follow the process through Of course this is done after making a full backup of both files and database.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

This has now been resolved in the 4.7.16 release. Please update if you are seeing this issue. If you are then still seeing the issue, please let us know.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.
 

You would need to contact google on this. I can access your sitemap with no problem at all, and the content looks to be fine. So the issue appears to be on their end

thank you @Marc Stridgen, will let you know