Hello George,
It seems that the DVR is using the obsolete HELO greeting (as introduced by RFC821) and this is why Axigen is closing connection when it tries to authenticate.
2020-11-13 13:19:56 +0200 16 cnn-server-2019 SMTP-IN:00001DD6: >> 220 mail.connord.ro
2020-11-13 13:19:56 +0200 16 cnn-server-2019 SMTP-IN:00001DD6: << HELO dvrdvs
Most probably there is no way to enable ESMTP (introduced byr RFC2821 into the DVR configuration so I see no other options but to disable authentication on DVR side and add a relay exception (if needed - local delivery, by default, is permitted without authentication) for its IP address.
HTH,
Ioan