Hey Jeremy, Thanks for the quick response. Sorry, I neglected to mention that I had substituted "host.com" for the real SMTP server domain... out of habit, I suppose. I was more focused on the errors in the logs and what a NULL value might mean in the log entry. For that matter, I was mostly concerned about the other entries I noted that actually had various IP's and hostnames.
Anyway, I wasn't sure that it was important, but if it makes a difference, the real hostname is smtp05.dc2.safesecureweb.com. Before you try, I can tell you that this server does not currently resolve any DNS. When we added these servers to our SMTP configs last week, they all resolved A records, but smtp05-08 no longer return any DNS records at all (smtp01-04 still resolve just fine). I'm not sure why; we don't control these servers. They just stopped resolving later that same day. However, this brings up another question. If I still have smtp05-08 in my "relay_from_hosts" list, why am I getting these strange errors in my logs? Is this some sort of exploit or an "anomaly" in the code? Thanks for your help! -Bill On 12/27/05, Jeremy Harris <[EMAIL PROTECTED]> wrote: > Bill wrote: > > I recently had to add 8 internet SMTP servers (smtp01.host.com - > > smtp08.host.com) to my "relay_from_hosts" list in my exim config in > > order to accommodate email from our hosted web servers. Ever since > > then, I've been getting numerous errors in the exim_mainlog file -- > > more than 30,000/day (out of a total of ~220,000 entries/day) -- from > > one of these hosts (smtp05.host.com). > > Well something is odd just with those names - I get (on a sample > size of one), the same forward resolution for both smtp01.host.com > and smtp05.host.com - 206.207.85.33 - and a reverse of that of > "www.anything.com". > > So, did you *really* mean those names? Or is your own DNS on > the fritz? > > Cheers, > Jeremy > > -- > ## List details at http://www.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://www.exim.org/eximwiki/ > -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
