Hi All
Am getting below error between 2 exchange servers running exchange 2013 sitting in the same AD site. We have just done an upgrade from exchange 2007 to 2013. Mail flow was fine before then
451 4.4 0 primary target ip address responded with 421 4.2.1 temporary authentication failure exchange 2013
The setup is like Exchange Server 2013 Box A >> ASA >> CP Firewall >> Exchange server 2013 boxB
Mails from Exchange server BOX B to BOX A are flowing fine but from BOXA to BOX B are queing up on BOX with above error
Action taken thus far is to disable ESMTP on ASA and modify permissions on receive and send connectors but to no avail