Thank for your advice Stan
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Stan Hoeppner Sent: Saturday, March 03, 2012 10:58 PM To: [email protected] Subject: Re: Dkim with postfix On 3/3/2012 6:31 AM, KingT wrote: > Thanks...the first postfix + OpenDkim is oked. > > But need more setup SPF ???? for my mail server more trust and not list in spam... Using DKIM and SPF doesn't automagically make your mail server more trustworthy in the general sense. It may help keep your messages out of recipient spam folders at Google and Yahoo, but that's about it. There are plenty of snowshoe spammers who use both DKIM and SPF, and there is plenty of spam emitting from both Yahoo and Google, who both use DKIM and/or SPF. On top of that, many sites don't check for DKIM/SPF at all. IP reputation matters more than anything. 1. Make sure you send from a static IP address with custom rDNS and a matching A record, and a matching EHLO string. 2. Make sure that IP is in a "good neighborhood". Check Senderbase to see if there are spammers (lots of red) in your /24 block. If there are you need to find a better network provider, or ask that they assign you an IP address in a clean neighborhood. 3. Register the IP of your server with list.dnswl.org. 4. Vietnamese IP space seems to have a reputation in the West for a very high spam:ham ratio. You outbound connections to some Western MX hosts may be given negative scoring or blocked outright due to this. DKIM/SPF will most likely not overcome this. -- Stan
