Exim Username-Based Authentication (DirectAdmin)

  1. Ensure the outgoing authenticating user is added in the SpamExperts systems my following the instructions to Add an Outgoing User
  2. Ensure the outgoing user has appropriate limits set to match your traffic volumes
  3. Open the Exim configuration file /etc/exim.conf
  4. Add the following to the Routers section after Begin Routers:
    5. 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}}\n\
X-AuthUser: $authenticated_id
headers_add = X-AuthUser: $authenticated_id
transport = spamexperts_smarthost_transport
route_list = $domain SMARTHOST::587
no_more

    Where SMARTHOST is smtp.antispamcloud.com or as otherwise detailed here.

  5. Depending on the configuration, you may have to comment "lookuphost:" router
  6. Add the following to the Transports section after Begin Transports:
    7. 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
hosts_require_auth = *

    Where SMARTHOST is smtp.antispamcloud.com or as otherwise detailed here.

  7. Add the following to the Begin Authenticators section: 
    8. spamexperts_login:
driver = plaintext
public_name = LOGIN
client_send = : username@demo-domain.invalid : yourUserPassword

    Where username@demo-domain.invalid is the full email address and yourUserPassword is the password for the Authenticating user as configured in SpamExperts

  8. Restart Exim
  9. If you are signing with DKIM on your Direct Admin server you may need to add the following line under hosts_require_tls

    10. .include_if_exists /etc/exim.dkim.conf

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