helo dvrdvs - email problems

[brixsat]

Hi,

First of all thanks for the help.

Second, i have a hikvision nvr that when i try test email, it fails to send. I check the logs of the email server and its doing the protocol wrong. I tis sending "helo dvrdvs" instead of "ehlo dvrdvs". This makes the exim server fail to accept the auth command.

How can i make the nvr send the "ehlo dvrdvs" instead of the "helo dvrdvs". I am not using gmail, but a hosting provider server with exim running.

Model: HWN-2108MH
Firmware: V4.30.091 build 220919
Encoding version: V5.0 build 210320
Web version: V4.0.1 build 201029

The commands sent by the nvr.

[root@cp ~]# nc 127.0.0.1 25
220 cp.mydomain.net ESMTP Exim 4.97.1 Mon, 06 May 2024 09:29:10 +0100
helo dvrdvs
250 cp.mydomain.net Hello dvrdvs [127.0.0.1]
auth login
503 AUTH command used when not advertised

What should be sent:

[root@cp ~]# nc 127.0.0.1 25
220 cp.mydomain.net ESMTP Exim 4.97.1 Mon, 06 May 2024 09:29:34 +0100
ehlo dvrdvs
250-cp.mydomain.net Hello dvrdvs [127.0.0.1]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
auth login
334 VXNlcm5hbWU6



Thanks in advance.

 

[brixsat]

I have made a python proxy to try to solve the issue, now i receive the email but the dvr still says failed.