There are two ways to unsubscribe from CCL:
For computer security reasons you need to retype this number: in this box: . Your unsubscription request will not be accepted without it.
To unsubscribe using this Web form you need to view a header of the CCL message. Your mail reading program usually provides you with this information. Check under options like: View Header, Message Source, etc., or hit h in pine. Check also instructions for Gmail. You need to find two lines: the To: line (that should show your e-mail address, the one that you want to unsubscribe) and the Message-Id: line (that has some sequences that confirm your identity). Enter these lines in the fields below:
Thank you for participating in CCL discussions. CCL Administrators chemistry-request@ccl.net