Bad HELO - Host impersonating domain name

Im tryin to email from a different server with my email credentials (from an another DA server) but no luck:
DA server the emails working fine but on the other system (windows server) there is a program that needs te mail and simply put my mail server details and user credentials dont work

Bad HELO - Host impersonating domain name

Where can i whitelist the ip of the sending server so that helo check doesnt happen ?

EDIT:

Found a post that can help other people
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Hi i've faced the same problem, i've solved it by editing exim.conf in the mail server like this

just after #EDIT#16
hostlist relay_hosts = net-lsearch;/etc/virtual/pophost

i've added this line

hostlist allowed_helo = net-lsearch;/etc/virtual/allowed_helo

and changed #EDIT#25 from this

# deny if the HELO pretends to be one of the domains hosted on the server
deny message = HELO_IS_LOCAL_DOMAIN
condition = ${if match_domain{$sender_helo_name}{+local_domains}{true}{false}}
hosts = ! +relay_hosts
accept

to this

# deny if the HELO pretends to be one of the domains hosted on the server
deny message = HELO_IS_LOCAL_DOMAIN
condition = ${if match_domain{$sender_helo_name}{+local_domains}{true}{false}}
hosts = ! +relay_hosts
hosts = ! +allowed_helo
accept

finally i've added the first server ip in /etc/virtual/allowed_helo and restarted exim

Yoiu should use latest exim_conf instead of manually change that file, latest 4.5 exim.conf alraedy prevent the smtp send to pop conneced user requiring separate authentication for smtp.

Best regards