Exim IP based authentication (DirectAdmin)

Log in to SpamExperts, ensure the IP address is added as an authenticating method by following the Add an Outgoing User > Authenticating IP or Range instructions
1. When adding the Authenticating IP, ensure the correct limits are set matching your traffic volumes
Open the /etc/exim.conf file

Add the following in the Routers section (after the begin routers line):

spamexperts_smarthost_router:
driver = manualroute
domains = ! +local_domains
ignore_target_hosts = 127.0.0.0/8
condition = "${perl{check_limits}}"
# Exclude null sender messages from relaying via the smarthost
condition = ${if or {{!eq{$sender_address}{}} {!eq{$sender_host_address}{}}}}
headers_add = ${if !eq{$original_domain}{$domain}{X-Forwarded-For: $original_local_part@$original_domain}}
headers_add = X-AuthUser: $authenticated_id
transport = spamexperts_smarthost_transport
route_list = $domain SMARTHOST::587
no_more

You MAY have to comment "lookuphost:" router depending on your configuration

Add the following in the transports section (after begin transports):

spamexperts_smarthost_transport:
driver = smtp
# In-case your server continues to send outgoing over port 25 please add the below line
port = 587
hosts_require_tls = SMARTHOST

Finally restart Exim
If you are signing with DKIM on your Direct Admin server you may need to add the following line under hosts_require_tls
```
.include_if_exists /etc/exim.dkim.conf
```

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