On 09/02/2013 12:11 PM, Noel Jones wrote: > On 9/1/2013 6:57 PM, Roman Gelfand wrote: >> On every machine, at different locations, I have tried "dig -x ip >> address" and it works correctly. >> >> I have 4 messages stuck in a queue which are complaining about the >> very thing that works. >> >> refused to talk to me: 451 Sender's ISP has no reverse DNS for ip address >> >> Can somebody tell me what is going on? > > It appears the recipient is unable to find your rDNS. You might > check your setup with some external tools, or maybe the recipient's > DNS is broken. > > Or the reason given could be incorrect, and they don't want your > mail for some other reason. If your DNS looks OK, you'll need to > contact their postmaster.
A lot of times the complaint is about RDNS when they really mean FCRDNS. Check that forward records match as well before you go off complaining to the other postmaster. Peter
