Hi @paddyam Kindly note that this is not a new setup. I have been using the existing email on this domain for 2+ years and the emails have been coming through all okay all these days except from the last 4 days. May I know any new rule is implemented that caused this? All verifications are done for the sending domain and the sending domain is used on other sites as well where it is working fine.
Edit 1: Changing the plugin to “Posts SMTP” fixed the issue, but I really want to go back to WP Main SMTP, so hoping for a fix from your end