configuration of smtp relay between two directadmin server

[mohamadsajedi]

Hello my friends
i've got two directadmin server in two different datacenter in A and B locations. one of the datacenters dont allow anyone to send mail and reject all of the mails.
so i need to relay all mails of A server to B server .
i've followed these urls :

Configuring and customizing Exim | Directadmin Docs

DirectAdmin Knowledge Base

docs.directadmin.com

Sending mail through another DA server

I have a new server that has a really low mail volume (e.g. 1-10 mails per day) and it is causing me headaches with Microsoft (Hotmail, live, outlook) delivery. For example their tools only start working from 500 daily volume. For the next 6-12 months I would like to have these mails send...

forum.directadmin.com

but now i've got an error on both sides and this is error body message on server B :
2021-12-11 23:28:40 H=(XXXX.XXXXX.XXX) [server A ip] X=TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no F=<mail account of sender in A server> rejected RCPT <destination mail account>: relay not permitted, authentication required
so what is wrong
where i must set password on exim of server A.
i've configured the following also on server A in /etc/exim.authenticators.post.conf file :
auth_login:
driver = plaintext
public_name = LOGIN
#replace your@email and yourpass
hide client_send = : mail_account_on_server_B : pass_mail_account_B

Thank you for your help

 

[mohamadsajedi]

anyone?

 

[mxroute]

So this is the exim ACL you're triggering:

  # restrict port 587 to authenticated users only
  # see also daemon_smtp_ports above
  accept  hosts = +auth_relay_hosts
          condition = ${if eq {$interface_port}{587} {yes}{no}}
          endpass
          message = RELAY_NOT_PERMITTED_AUTH
          authenticated = *

I would suggest that server A is not authenticating on server B. Do you have hosts_require_auth configured on your transport?

 

[mohamadsajedi]

thank you my friend.
yes i've got the following file on my server B:

http://files.directadmin.com/services/SpamBlocker/smart_route/exim.transports.pre.conf

how can i authenticate server A for server B?

 

[Active8]

Did you saw this ?

Configuring and customizing Exim | Directadmin Docs

DirectAdmin Knowledge Base

docs.directadmin.com

 

[mohamadsajedi]

@Active8 yes i read all of pages and documentations .
found the problem
this is the answer :
accept hosts = +auth_relay_hosts
condition = ${if eq {$interface_port}{587} {yes}{no}}
endpass
message = RELAY_NOT_PERMITTED_AUTH
accept authenticated = *

you must accept connection from authenticated hosts
now everything is ok
Thanks @mxroute