Upgrade to 7.0.1 DNS reverse lookup errors intermittent

HCL Domino Domino Forum
1

After a recent upgrade from 6.5.4 to 7.0.1, I am now getting an infrequent but regular(several times daily) DNS error from domino suggesting that the reverse lookup to my email gateway has failed. This is resulting in rejected emails. Oddly, moments after the lookup failure, the lookup is successful again. Is this a bug? Perhaps it is timing out unusually quick. If so, can I adjust this timeout? Any other possibilities?

[20760:00014–1727030352] 11/15/2006 05:27:09 PM SMTP Server [20760:00014–1727030352] Connection from [199.118.185.173 ] rejected for policy reasons. IP address of connecting host not found in reverse DNS lookup.

[20760:00014–1727030352] 11/15/2006 05:27:09 PM SMTP Server: 199.118.185.173 connected

[20760:00014–1727030352] 11/15/2006 05:27:09 PM SMTP Server: 199.118.185.173 disconnected. 0 message[s] received

Thanks,

Daniel

2

Subject: Upgrade to 7.0.1 DNS reverse lookup errors intermittent

If you have more than one DNS server in the rotation, and the reverse lookup zones are different, it can cause this issue. This often happens where DNS server “a” has an updated zone but “b” does not.

You can check each of the DNS servers with nslookup to be sure.