> Hi, Dennis!
> I have to renew extensive exim4 studies. I remember that it has a lots of
> useful debug functions - such as send email directly using command line,
> with verbose logging what is it doing. Problem that I do not know what
> filter, transport is should work for this situation. Also it is sounds
> suspiciouse that "sender <>" should be transported. It could break other
> security settings of mta - made up by Debian package managers, robust and
> safe. I'm affraid that I will solve this situation but other security
> issues would arise!?
> CU
>   tovis

Hi Tovis,

have a look in http://www.rfc-ignorant.org/rfcs/rfc1123.php

one part is:
    5.2.9  Command Syntax: RFC-821 Section 4.1.2

         The syntax shown in RFC-821 for the MAIL FROM: command omits
         the case of an empty path:  "MAIL FROM: <>" (see RFC-821 Page
         15).  An empty reverse path MUST be supported.

You can disable this feature, but your mta will not be compatible to smtp
rfc. Why you have to support it is another question. (-;

CU
Dennis



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