Reverse DNS, EMail, Dedicated Server newbie
209.xxx.xxx.139 as my 'main IP'
216.xxx.xxx.47 listed as lo:1, which is my DirectAdmin IP address
66.xx.xx.80 to .87 listed in ifconfig as lo:2 to lo:9
I succesfully setup 2 sites on 66.xx.xx.80 as a shared IP address, and setup 66.xx.xx.86 and 66.xx.87 as name servers. I then switched the DNS servers for the sites with NetworkSolutions to be the .86 and .87 addresses. Pinging one of the web sites (www.bogusnamehere.com) from home shows me 66.xx.xx.80 as its IP, and browsing to the URLs work. I also set up the reverse DNS for the 66.xx.xx.8? IP addresses (outside DirectAdmin) and those IPs reverse lookup ok using tracert. I can not however setup reverse DNS for the main IP of 209.xxx.xxx.139 (there is no option to do so).
I am also able to send email out, and receive email from the sites, most of the time. Some sites seem to be blocking my email (AOL in particular), and I attributed this to the fact that the main IP has no reverse DNS setting.
When exim sends out emails, it is using the main .139 email address, and I believe that is why AOL is denying the emails. exim seems to be sending out emails using the .139 IP address, and the boxes hostname and domainname as part of its protocol. If I look at the emails I received that were sent by one of my test domains, it shows that it was received from hostname.domainname (as configured in my /etc files) with the .139 IP address.
Finally, running a dnsreport.com check shows no problems with one of my sites. It has some warnings that are acceptable (i.e., "Only 1 MX record"). But there is also a warning that I think is related: "WARNING: One or more of your mailservers may be claiming to be a host other than what it really is"
My questions are this:
1. Is there a way to configure exim (or is it even possible) to have the emails sent from one of the 66.xx.xx.8x IP addresses, instead of the main IP? These IPs are already setup with reverse DNS.
2. If #1 isn't possible, should I configure the MX/mail record for my sites to be the 209.xx.xx.139 IP address?
3. If I modify my dedicated servers hostname and domain (ala etc/sysconfig/network and /etc/resolve.conf), can I cause problems with my provider, or DirectAdmin? I assume that then exim will send out a more appropriate hostname.
4. 15minuteservers charges $100 an hour for support, and they are in the nac.net facility, which only seems to provide support for internet connections (their support pages show me how to configure Outlook). Should I ask one of them to setup the reverse DNS on the 209.xxx.xxx.139 address?
TIA
