====== Exim4 - Use gmail ======

Configuring Exim to use Gmail as a Smarthost.

Add a router before or instead of the dnslookup router:

<file>
gmail_route:
  driver = manualroute
  transport = gmail_relay
  route_list = * smtp.gmail.com
</file>

Add a transport:

<file>
gmail_relay:
  driver = smtp
  port = 587
  hosts_require_auth = <; $host_address
  hosts_require_tls = <; $host_address
</file>

Add an authenticator (replacing myaccount@gmail.com and mypassword with your own account details):

<file>
gmail_login:
  driver = plaintext
  public_name = LOGIN
  hide client_send = : myaccount@gmail.com : mypassword
</file>

**$host_address** is used for **hosts_require_auth** and **hosts_require_tls** instead of smtp.gmail.com to avoid occasional 530 5.5.1 Authentication Required errors.  These are caused by the changing IP addresses in DNS queries for smtp.gmail.com.  $host_address will expand to the particular IP address that was resolved by the gmail_route router.

**<;** is required for the **hosts_require_auth** and **hosts_require_tls** lists because $host_address can contain colons (the default list separator character) when sending with IPv6.