DNS Timing, mine is slipping, why? Also a few other problems... :(
When I originally closed our DNS servers (back when we had about 40 domains on our server) our DNS timing improved from a C to an A+.
Now that I have nearly 100 domains my DNS timing has slowed 14ms, giving me only an A rather than A+ hosting. One of our major selling points is that we offer A+ DNS timing.
My questions are:
A) How can I identify what caused my DNS timing to decrease.
B) Does the fact that my second DNS server is virtual causing a lag?
C) If I were to outsource my secondary DNS server to a company such as dnsmadeeasy.com help improve my overall DNS timing score?
D) Could I run a real second DNS server on the same server or would I need a seperate server with a different IP?
E) Could that secondary server function solely as a DNS server?
What is the most common way of introducing a real secondary DNS server?
Also on a side note:
On DNS Report.com I am receiving a warning for my mail server:
WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.
mail.richdj.com claims to be non-existent host dedicated.richdj.com:
220 dedicated.richdj.com ESMTP Sendmail 8.12.10/8.12.10; Thu, 12 Oct 2006 14:06:40 -0400
Where can I go in and correct this?
It also mentions that I do not have Your domain does not have an SPF record, would I have to create specific SPF records for all of my domains seperately or is there anyway I can have them generated on the server so I do not have to?