On Thu, 22 Feb 2024 at 14:12, Derick Rethans <der...@php.net> wrote: > On 22 February 2024 08:52:49 GMT-05:00, Robert Landers < > landers.rob...@gmail.com> wrote: > >I have noticed quite a number of emails appearing on externals but not > >appearing in my inbox. I randomly get an email saying: > > > >Hi, this is the Mlmmj program managing the <internals@lists.php.net> > >mailing list. > > > >Some messages to you could not be delivered. If you're seeing this > >message it means things are back to normal, and it's merely for your > >information. > > > >Here is the list of the bounced messages: > >- 122446 > >- 122448 > > > >But I can clearly see far more than that in externals that are never > received. > > > >IIRC from the email spec and internet customs, soft-bounces should be > >retried for a number of days (though I have no idea why gmail > >soft-bounced the messages, maybe rate-limiting?). > > > >If I'm using gmail and not getting emails, how many other people are > >also not getting emails on this list? > > > Lots. > > Gmail is rejecting emails after we moved the servers without telling us > why, in enough detail to do anything about it. > > We can put a delay in delivering to Gmail, but that means mails get > delayed for days. > > So my advice would for now to not rely on Gmail while we figure out how to > improve this. > > cheers > Derick >
This could be related to the new servers new ip not being trusted. Did you do any sort of IP Warming <https://docs.sendgrid.com/ui/sending-email/warming-up-an-ip-address> for the new server? As without this, Google sees a new IP sending thousands of emails out of nowhere and it triggers spam filters. We have to do this at work when we onboard a new client, since we give all clients apps there own IP, we have to run a 14 day warming system before we can let the client go live, since without it, their emails will most likely be blocked for spam from various inbox providers.
