sending a malformed email from pop3 server

Hey guys,
I am working on a system which receives a corrupted emails blocking the system from pulling emails which get stuck in the mail server. Apparently the bad emails do not end properly. I think according to protocol each email should end with "\r\n.\r\n", however, looks like the malformed emails don't end like I said causing problem with detecting the size which in turn causes reading too much and problem with the next email.

I am not saying exactly that the message itself should be ended with "\r\n.\r\n". I made my question around what I see in the code where it is trying to read (data from bio connection)and detect "\r\n.\r\n". The code, when sees this string, marks the end of buffer with '\0' and returns successfully from the function which is reading the content from socket; otherwise, if it does not find the string prints an error indicating the 'end was not found' and then returns unsuccessful.

I was wondering how can I create and send a malformed email, so I can receive it and debugge our system to see how it is reacting to this problem.

I appreciate any input on how to write a small tool using python, c# or c++ to send such an email.
Thanks,

Tags: C++, C#, Python