> Is it possible to compare for a particular strings in header:
>
> Something like the one given below:
>
> -----------------
> mycustom_route:
> driver = dnslookup
> condition = "Check if the email header contains the string
> "X-Mail-Forwarder" --- Not sure how to achieve this
> ignore_target_hosts = +loopback : 64.94.110.0/24
> headers_add = "${perl{mailtrapheaders}}"
> transport = remote_smtp
> -----------------
>
Check out
http://www.exim.org/exim-html-current/doc/html/spec_html/ch-string_expansions.html
and look for
def:header_<header name>: or def:h_<header name>: This condition is true if a message is being processed and the named header exists in the message.
Hopefully that will do the trick.
John
