Hello everyone,
I'm writing this message to ask for advice on a filter i'm writing.
The thing is that I've got a server running postfix in which i already
have a postfix filter written in Perl. When i have to reinject the
message into postfix, i do it with the SMTP class from Perl, which
doesn't give me any problem at all.
However, i have to write a new one in C/C++ and I'm getting some trouble
with the "dot" indicating the "end-of-message". The problem is that when
i send the message back from the filter written in C/C++ anyone can
perform a spam injection by sending messages with this content:
.
MAIL FROM: unremit...@mydomain.com
RCPT TO: vic...@otherdomain.com
DATA
spam spam spam
.
and vic...@otherdomain.com will get a message from
unremit...@mydomain.com containing "spam spam spam"
I've tried with different implementations in C and also C++. Some people
have developed SMTP classes for C++ which I've tried, but none can't
stop this spam injection from happening.
So.. my first question would be... how does postfix itself handle this?
Or... what can i do in my filter to tell postfix that doesn't have to
take CR LF.CR LF as the end of the message?
Has anyone found a solution for this while using postfix filters?
Thanks in advance for your help.
