[tlug] Off-Topic How to unsubscribe

["Morteza Mousavi" <mousavi@example.com>]

I would like to unsubscribe from the TLUG mailing list for a while but 
do not know how to do that. I could not find any options in the web 
site. Sent a message this morning to 
listmaster@example.com
but it has come back to me with a USER UNKNOWN message. 
Will appreciate  the info.
Thanks
M. Mousavi