On 02/02/12 21:08, Rob Kampen wrote: > On 02/03/2012 06:35 AM, Ned Slider wrote: >> On 02/02/12 15:44, Giles Coochey wrote: >>> On 2012-02-02 15:39, Ned Slider wrote: >>>> I would recommend removing reject_unknown_client from your >>>> smtpd_sender_restrictions. >>>> > I think this will allow the mail through - but when I look at my logs > just in the last week we have over 5400 rejects due to unknown client > and only 24 of these are from this client - all the rest are junk. > Correct. I simply identified the problem and made a recommendation to fix it (i.e, prevent it from happening). As I said before there are more reliable ways to block spam than relying on correctly configured/working upstream DNS. <snip> > > Final question for the list - does anyone use "reject_unknown_client" - > it has given me the most grief with legitimate clients that have poorly > administered domains. Hence my recommendation to remove it. But it's your server and your mail flow, ymmv :-)