Null Sender Question

[Daniel Straka]

My MTA is sendmail v8.13.6

>>> On 10/6/2008 at 10:58 AM, in message
<FF0F632D-6803-4A60-9A4A-4B7B93A1835F at rtpty.com>, Alex Neuman van der Hans
<alex at rtpty.com> wrote:
> I believe this is mta-dependent, so more info on that would help.
> 
> On Oct 6, 2008, at 11:49 AM, Daniel Straka wrote:
> 
>> Where can I fix this so the messages come from a postmaster or user?