Won't work well without that setting.
Interesting that it worked fine until this week without any change there. Changed now, so looking forward to the next sale to see if everything works.

Quote Originally Posted by swguy View Post
I am seeing issues like this (DKIM/SPF, etc.) more and more frequently.

Thanks to the work of @dbltoe and others, we have some good documentation on this topic:

https://docs.zen-cart.com/user/email...dkim-and-dmarc
Thanks. Will look at it.