Hello, I’m working with @Jacob_Peebles on this issue, and here is our SMTP configuration
Our sending domain from Netcore is
and we have configured the mail receiver to enable the reply by email feature with this domain
But unfortunately, we got this from Netcore
553 5.7.1 replies+verp-43fdbee91575167a6b7634f2bc5d2e52@reply.mamapedia.com: Sender address rejected: not owned by user
And according to the attached screenshot for our configuration, the sending or notification email is “message.mamapedia.com” and reply-to is “reply.mamapedia.com”