Here is the nslookup results. To be honest, I saw groupon, and thought there is no way such a big company would not be set up right, but now I am not so sure:
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft
Corporation. All rights reserved.
C:>nslookup server 199.191.128.103
Default Server:
rbru.br.rs.els-gms.att.net Address:
199.191.128.103
set q=mx groupon.co.uk Server:
rbru.br.rs.els-gms.att.net Address:
199.191.128.103
Non-authoritative answer:
groupon.co.uk MX preference = 10,
mail exchanger =
groupon-1.mx.heinlein-support.de
groupon.co.uk MX preference = 20,
mail exchanger =
groupon-3.mx.heinlein-support.de
groupon.co.uk MX preference = 10,
mail exchanger =
groupon-2.mx.heinlein-support.de
I pinged
groupon-1.mx.heinlein-support.de in
another window, and it came back as
91.198.250.10
set q=ptr
91.198.250.10 Server: rbru.br.rs.els-gms.att.net Address:
199.191.128.103
Non-authoritative answer:
10.250.198.91.in-addr.arpa name = mx1.heinlein-support.de
The fact is that that unless they are doing something I don't understand the return on that PTR record, mx1.heinlein-support.de, should match the name of the MX 10 record, or the mail will be dropped by Hotmail.
3The sender probably does not have a PTR record properly set up. Hotmail will drop all such e-mail with no notice. If you post the domain of the sender (I don't need the entire e-mail address), I can do an nslookup and check for you for certain. – KCotreau – 2011-06-14T14:42:56.077
Ok. The domain is "@news.groupon.co.uk". – Urbycoz – 2011-06-14T14:56:19.743
1"I have been given the suggestion that they are being blocked by my firewall." -- for any reasonable definition of "my" and "firewall", that suggestion is nonsensical. There's just no mechanism for anything like that to move a message into your junk folder. – Mike Renfro – 2011-06-14T15:23:29.927
@ Mike. Good, that's what I told 'em. – Urbycoz – 2011-06-14T15:35:49.487