I still seem to have an ongoing problem, I've checked the server via abuse.net and it all came back relay denied.
But this morning I had this in my logwatch ouptut :
Top relays (recipients/connections - min 10 rcpts, max 50 lines):
32/32: localhost.localdomain [127.0.0.1]
19/19: mailgate2.arcor-ip.de [188.8.131.52]
I could legitmately expect the top two (although given that the server only sent out 10 messages as apache that still confuses me) but the .de shouldn't be there.
Below is one of the email pairs associated with that relay.
Jun 19 16:36:09 #*$!#*$!x1 sendmail: m5JFa98w028057: from=<>, size=7988, class=0, nrcpts=1, msgid=<20080619153601.6AB64F0D681@mailgate1.adm.arcor.net>, proto=ESMTP, daemon=MTA, relay=mailgate2.arcor-ip.de [184.108.40.206]
Jun 19 16:36:12 #*$!#*$!x1 sendmail: m5JFa98w028057: to=<enquire@#*$!#*$!#*$!#*$!.co.uk>, delay=00:00:03, xdelay=00:00:03, mailer=local, pri=38213, dsn=2.0.0, stat=Sent
Can someone help me understand this please.