I've had emails rejected by opensuse.org mailing list because i've used "Cut and Paste".  I've replied to an email but cut and pasted some data from an existing opensuse.org mailing list email. It causes the email checker at the opensuse.org mailing list to reject the email with the following message.
"This list does not allow:
* Attachments
* Mails from other lists
* HTML mails (also multipart text/html!)"

I've not added an attachment.
i've not formatted the data in any way.
i've not sent an email from another list (not enven sure what this means).

The only 2 points of failure i can think of are:-
1. pasting process in Kmail
2. the way the data is transferred from the paste buffer to the application.


Reproducible: Always

Steps to Reproduce:
1. read a valid mailing list email
2. pressed "Reply" and entered some data
3. opened another  valid mailing list email and highlighted a section of text 
and pressed "Ctrl c" to copy it
4. I went back to the email reply i was editting and pressed "Ctrl v" to paste 
the data into the reply.
5. I re-arranged the data at bit using the backspace/delete key and inserted 
new data just using the keyboard keys. At no point did i format any data in the email.  
6. Send the email
Actual Results:  
Email rejected by mailing list

Expected Results:  
Email to be accepted