Hello, On every post I get an error mail back: <BEGIN> Subject: Undelivered Mail Returned to Sender From: "Mail Delivery System" <MAILER-DAEMON@xxxxxxxxxxxxxxx> Date: Tue, July 18, 2017 15:36 To: ... Priority: Normal This is the mail system at host lists.squid-cache.org. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <squid-users@xxxxxxxxxxxxxxx> (expanded from <squid-users@xxxxxxxxxxxxxxxxxxxxx>): mail forwarding loop for squid-users@xxxxxxxxxxxxxxx <END> Why? Thanks, Walter _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users