Transport: permit an empty string for the transport_filter option. Bug 1714

[exim.git] / test / log / 0188

1999-03-02 09:44:33 ETRN #some.random.domain received from [127.0.0.1] U=CALLER
1999-03-02 09:44:33 exec of "/some/non-existent/file" (ETRN) failed: No such file or directory