Greetings! We are the mid-west office of the ASPCA (Illinois). Our HQ is in NYC. Our wires, DNS, etc are via AT&T. Their wires, DNS, etc are through QualityTech. As NY is the parent office (to say nothing of older and bigger), the QualityTech system is the SOA for ASPCA.ORG. For the Illinois public addresses (including the IP address stamped onto all our outgoing email), we have NS records on the QualityTech system pointing our network (mwro.aspca.org) to the AT&T name servers. All had been well the past several months...
Last week, attempts to send mail to various corporations and educational institutions has been bouncing. The headers of our bounce notices say simply "Failed to connect to SMTP host COMPANY.COM because: Remote system no longer responding" One company told us it is because the IP address is not resolving properly... I have checked the DNS tables for QualityTech, and they do show "mwro" being delegated to a pair of AT&T DNS servers. I have checked the DNS tables for AT&T, and we do have records in both forward and reverse lookup zones (br.mwro.aspca.org <-> 12.15.29.130). Any ideas (while I wait and wait and wait to talk to AT&T)? The Boss suggests the "fix" for last month's "DNS Poisoning" might have "fixed" things so that anything claiming to be from [anything].aspca.org must resolve to a QualityTech address and not to an AT&T address. Still, I don't see that we can do much to fix this... We are considering using a VPN tunnel to try to use a NY machine as an outgoing SMTP server. What else might we try? Other folks experiencing this? Thanks!!!!! -------------------------------------- Richard McClary, Systems Administrator ASPCA Knowledge Management 1717 S Philo Rd, Ste 36, Urbana, IL 61802 217-337-9761 http://www.aspca.org ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
