> # Some fixed variables
>
> exim_path: TESTSUITE/eximdir/exim
+> exim_version: x.yz
> config_dir: TESTSUITE
> config_file: TESTSUITE/test-config
> primary_hostname: myhost.test.ex
>
> true
>
+> # Environment access
+>
+> CALLER
+> correct
+>
>
> escape: B7·F2ò
>
> yes
> match_address: no
>
+> -be Sender host name and address etc, all unset
> -oMa sender_host_address =
> sender_host_port = 0
> -oMaa sender_host_authenticated =
> -oMs sender_host_name =
> -oMt sender_ident = CALLER
>
+> -be Sender host name and address etc, all set except host name.
> -oMa sender_host_address = V4NET.0.0.1
> sender_host_port = 1234
> -oMaa sender_host_authenticated = AAA
> -oMr received_protocol = special
> -oMt sender_ident = me
>
+> -be Sender host name explicitly set
> -oMa sender_host_address = V4NET.0.0.1
> sender_host_port = 1234
> -oMs sender_host_name = my.host.name
>
+> be Sender host name lookup fails (V4NET.11.12.13 is not reverse registered)
> -oMs sender_host_name =
> host_lookup_failed = 1
>
+> -be Sender host name and protocol set by Sendmail-compatible option
> -p received_protocol = special
> -p sender_host_name = host.name
>
+> -be Sender host name and address etc, all set except host name
> -oMa sender_host_address = V4NET.0.0.1
> sender_host_port = 1234
> -oMaa sender_host_authenticated = AAA