Hallo, I wanted to unsubscribe from the list. I looked at the headers of the most recently received email and saw:- List-Help: <http://listserv.fnal.gov/scripts/wa.exe?LIST=SCIENTIFIC-LINUX-USERS>, <mailto:[log in to unmask] SCIENTIFIC-LINUX-USERS> List-Unsubscribe: <mailto:[log in to unmask]> List-Subscribe: <mailto:[log in to unmask]> List-Owner: <mailto:[log in to unmask]> List-Archive: <http://listserv.fnal.gov/scripts/wa.exe?LIST=SCIENTIFIC-LINUX-USERS> I chose:- > [log in to unmask] but my email was bounced by Message Labs who occupy the 2 highest priorities of the 3 MX entries for LISTSERV.FNAL.GOV > LISTSERV.FNAL.GOV mail is handled by 20 cluster4a.us.messagelabs.com. > LISTSERV.FNAL.GOV mail is handled by 100 LISTSERV.FNAL.GOV. > LISTSERV.FNAL.GOV mail is handled by 10 cluster4.us.messagelabs.com. The rejection message was, confirmed by a repeated attempt,:- >>>>>>>>>>>>>>>>>>.. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: [log in to unmask] SMTP error from remote mail server after RCPT TO:<[log in to unmask]>: host cluster4.us.messagelabs.com [216.82.250.19]: 550-Invalid recipient <SCIENTIFIC-LINUX-USERS-unsubscribe-re 550 [log in to unmask]> (#5.1.1) ------ This is a copy of the message, including all the headers. ------ ............. ................ To: [log in to unmask] ............... ............... >>>>>>>>>>>>>>>>>>>>>>>>>>> Best regards, Paul.