Multiple postings

Dear list mom (or whomever), Every time I post to the list, I get this auto response from system-user@mms.mycricket.com

Your message was not delivered successfully.

Subject: White point readings - i1Pro2 vs. original Sent: Mon, 07 Jul 2014 12:41:23 -0700

The message could not be delivered to the following recipient: colorsync-users@lists.apple.com Final-Recipient: rfc822; colorsync-users@lists.apple.com Action: failed Status: 5.0.0 …<snip>…

This despite the fact my message posted successfully. Whatever is going on might explain the recent spate of multiple postings? Anyway, it would be great if this could be fixed. Thanks, John JWL Images Emeryville