This tends to go forwards and backwards as often times as needed based on how Lots of people will get the email. PS: should you’re considering Understanding more details on SMTP faults, in this article at Postmark we started a community SMTP Field Handbook to document the mistake codes https://virtualizationsupport69010.blogzet.com/the-smart-trick-of-google-workspace-support-that-nobody-is-discussing-41327217