Exim4 relay to Exchange

Exim4, Debian 5.0

1.  Generate a self-signed certificate and copy .crt and .key files onto server.

2.  Configure Exim4 for Smarthost relay:
dpkg-reconfigure exim4-config
- mail sent by smarthost; received via SMTP or fetchmail
- System mail name: domain.com
- Listen addresses: 127.0.0.1;192.168.35.33
- Other destinations (domains): localhost.localdomain
- Machines to relay mail (local network): 192.168.35.0/24
- Outgoing smarthost: 1.2.3.4 (Exchange server IP)
- Hide local name: yes
- Visible domain name: domain.com
- defauls for Dial on Demand: no, Split: no, maildir


3.  Setting up TLS for relay:
Reference http://www.gossamer-threads.com/lists/exim/users/80099#80099

Edit file at:
/etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost

Add these lines to the end of above file, adjusting paths for cert:
"
## TLS attempts for NFP relay:
TLS_CRT = /etc/exim4/tls/ssl_domain.com.crt
TLS_KEY = /etc/exim4/tls/ssl_domain.com.key
smtp_tls:
driver = smtp
hosts_require_tls = *
tls_certificate = TLS_CRT
tls_privatekey = TLS_KEY
"

4.  Restart Exim4, send test email, check headers - relay successful!