External SMTP relay


We're running Crossbox standalone and we want to use Amazon SES to send emails?


If you want to use services like Amazon SES, Postmark, or some other SMTP relay, you need to do the following (stand-alone version only):

Create /home/crossbox/app/config/exim/overrides/exim.authenticators.conf

driver = plaintext
public_name = LOGIN
client_send = : 6HSF5K7TX2RU17SMU4SE : "53H4EL704P3PVXPZQWFG14IBEHIQ9NLV873Z9LG6HDIL"

Replace the hashes in client_send with your own SMTP credentials:

Create /home/crossbox/app/config/exim/overrides/exim.routers.conf

driver = manualroute
domains = ! +local_domains
transport = ses_smtp
route_list = * email-smtp.eu-west-1.amazonaws.com;
condition = ${if match_domain{$sender_address_domain}{+local_domains}}

Change the hostname in route_list with the SMTP hostname that the provider assigned to you.

Create /home/crossbox/app/config/exim/overrides/exim.transports.conf

driver = smtp
port = 587
hosts_require_auth = *
hosts_require_tls = *

Run command via SSH (as root):

crossbox reload-config && crossbox exim restart
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