On 05/20/2015 01:02 PM, Mike McKoy wrote: > Actually, you probably don't. What makes you think you need to do this? > > I do and everyone does.
Sorry, no. > I send massive amounts of email and ever IP has > its own sender score. Yes, but provided you do proper spam filtering on your outbound mail this should work in favor of a single IP, since it will improve the score of that IP faster and better to have more HAM sent from it. > Also because I need to authenticate email as > originating from the domain for certain recipients to receive that mail. This is completely wrong. Mail does not have to come from a server with the same hostname as the domain it's sent from, if it did this would end up breaking tons of legitimate mail sent from everywhere, probably the vast majority of it, in fact. What is true is that you simply need to set the SPF records properly so that mail is allowed from the correct IP address(es). > My only reasoning is that Exim did before what postfix isn't designed to > do. Yes, but this particular feature is one that is usually requested by either (1) spammers, or (2) people who are misinformed or misguided as to how email works and restrictions placed on receiving it by other servers. I am not telling you that you can't or shouldn't do this, but I am saying to think again because your reasoning seems to be based on false assumptions or things that other people have told you that are incorrect. > i can't use exim because there are no tutorials that exist with > integrating Centos with exim. This is simply untrue, you can use exim if you really want and it is perfectly easy to do so in CentOS. CentOS does ship exim packages that are easy to install it's just not the default MTA that is installed on CentOS and I have already given you easy instructions to switch to exim if you really want. That said, I am not trying to convince you to switch to exim, I happen to much prefer Postfix, I am simply saying that your reasoning for not using exim is false. > I wasn't and have never asked for help > with that. I simply asked if there was a better solution. I have 7 > domains in production...do i really have to run 7 different instances of > postfix to send mail from each individual domain? No you don't, you don't even have to run multi-instances to send mail from individual IPs for each domain as Wietse has already given you a solution for that. The only exception to his solution is that it doesn't work for DSNs, but a properly configured postfix should be sending out a minimal amount (if any) of those anyways. Peter
