[BlueOnyx:06849] Re: Relaying Denied error

[Larry Smith]

On Thu March 31 2011 09:09, Samuel Lentz wrote:
> I just migrated one of my boxes from BlueQuartz to BlueOnyx.  This
> morning I am having users saying that they are receiving a relaying
> denied error. This is what is in the maillog:
>
> Mar 31 09:42:24 mailserver sendmail[17375]: p2VDgO5d017375:
> ruleset=check_rcpt, arg1=<to at address.com>, relay=[10.4.2.5], reject=550
> 5.7.1 <to at address.com>... Relaying denied. IP name lookup failed [10.4.2.5]
>
> If I am looking at the correctly, I am getting a denied due to a failed
> IP lookup (they are sending from an internal IP.)  Do I need to add
> 10.4.2.5 to my hosts file?
>

Several ways to solve that, 1. use smtp-auth (port 587) for all sending
(inside or out); 2. use poprelayd so that once an IP receives mail then
it is allowed to send; 3.  add your internal network(s) IP block to the
access file (allowed to send).  Preferred solution (IMHO) is (1) because
it solves all sorts of problems and just plain works...

-- 
Larry Smith
lesmith at ecsis.net