That sounds odd. I received my last notification email yesterday 14:46 CEST.
Can you go to gmail and go to 'show original', then look for the first received: line in the headers:
X-Received: by 10.140.81.198 with SMTP id f64mr39415154qgd.38.1394599241402;
Tue, 11 Mar 2014 21:40:41 -0700 (PDT)
Return-Path: <overloadut@ps37385.dreamhostps.com>
Received: from ps37385.dreamhostps.com (ps37385.dreamhost.com. [208.113.180.7])
by mx.google.com with ESMTP id u4si12331669qat.188.2014.03.11.21.40.41
for <[redacted]@gmail.com>;
That was the last one I actually received in gmail.
The e-mail confirmation i sent to my work address that did go through came from:
Received: from ps37385.dreamhostps.com (reflexmetal.co.uk [64.111.123.99] (may
be forged)) by [redacted] with ESMTP id 1jrrd9r19a-1 for
<[redacted]>; Fri, 21 Mar 2014 08:58:42 -0700
Received: by ps37385.dreamhostps.com (Postfix, from userid 1567866) id
066AD11336A431; Fri, 21 Mar 2014 08:58:40 -0700 (PDT)
Different IP address, same host name.
Weird...