Hello,
I have 2 excahnge servers,
domainA.com exchange server 2010
domainB.com exchange server 2013
I have send connectors and receive connectors on both sides that emails between these 2 domains are flown inside, the problem is that when I'm sending large mail from domainA.com to domainB.com NDR 5.2.3 is generated and received in mailbox from domainA.com mailbox, but from domainB.com to domainA NDR isn't received, so far domainA.com exchange 2010 isn't generating NDRs
Shota Tadumadze