Hi, I have three Bind servers. Off late I found qmail fails to send mail to microsoft.com
On checking for the cause of the issue on the internet, I found that qmail does a lookup for 'ANY' records of the domain (dig ANY domain.com). In case of @microsoft.com combined with Bind DNS server, the lookup times out. I tried it on the DNS server as well. It is able to pull records from another DNS server (ISP). But if I query my Bind DNS server, it times out. This results in Bounce back of emails to @microsoft.com Did anyone come across this issue before? It seems to be really old one dating back to bind version 4. As solution, it is suggested to use dnscache/djbdns to get around this issue. Many talk of size limit of query on qmail (512) but I guess that is not the case. Just doing 'dig ANY microsoft.com' from a BIND dns server, result in time out (make sure that your server is not pulling records from other DNS server when testing). For instance.. I have a server 172.16.25.203 as qmail server. resolv.conf is 172.16.25.113 -- our DNS server. I did a dig on qmail server and it queries the DNS server. The result is timeout. But, the same works fine for yahoo.com, google.com etc.. just fails with M$ y??? Please throw some light.. I am almost gone mad trying to understand y!!
