tritium

I'm totally confused.

I run several websites from my dedicated server and I think I'm getting hosed with the reverse DNS checking on some receiving mail servers. It's annoying that I have better email server through AOL then my personal mailserv (MailEnable Standard).

So far, I host the following domains on my server:

Each of those domains should have access to email. If I have host setup a reverse DNS record to my one IP (), then I can only have one of the listed domains returned as the result, correct? If I chose, for example, to be the domain returned for the stated IP, does that mean that all my clients will need to send email through ?

Am I correct in that what destination webservers are checking is the IP for the SMTP server from which they are receiving? Or are they comparing the reverse IP for the mailserver against the domain in the sender's address? If the later is the case, then what happens to the rest of my domains?

This is thoroughly confusing.

I've been getting these strange Domino Directory errors from some of the addresses I've written to (don't get that when I write from AOL... ). I'm thinking this is a blanket reply message to messages that don't pass the reverse DNS test (thwarts spammers, but totally fucks over your average Schmoe).

Results of a reverseDNS from dnsstuff.com
[quote]Reverse DNS for 67.19.103.122
Generated by www.DNSstuff.com

Country: UNITED STATES


Edit: Ok. So I figured out that the PTR records should point my IP to my hostname. But, "ipconfig /all" in the command prompt of Win2k3, shows "HOARD" as my "host name". This doesn't match the formating for any of the properly formed PTR record hostnames that I've seen. In this case, it looks like Linux is an easier beast to manage (I've found websites showing up to find a Linux-box's hostname, but nothing on Windows). I'm not hosting my DNS servers, so this is extremely complicated (I need to know *exactly* what to ask my host to do). ::sigh::

edit 2: Okay... I setup another A record on their DNS system for . Now I wait until that propagates and then I ask for a change in the PTR record. This is sooooo confusing. I still don't understand *why or how* this is going to help my email situation.

edit 3: Grrrrr... now I don't know how to change my server's hostname in Win2k3. I was told to "just change the computer name" but Windows doesn't like the full name, ....

edit 4: The way that windows does hostname changes is somewhat confusing and non-intuitive. You right click on "My Computer" then go to "Computer Name". You click the button labled "Change" and then you put in the first part of the hostname in "Computer name:". After that, you click "More" and put the domain in there. Stupid Redmond.... who knew you had to run the bloody tool twice. Grrrrr....

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Pragma

So I was getting ready to explain Reverse DNS - but now I'm confused if you still need help

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rekinom

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tritium

My host claims that they have changed the PTR record and that it'll take 24-48 hours to propagate! That makes no sense to me, as I can add additional A records and have them fully active only hours later (when the NS server refreshes at my host).

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hrdwareguy

It depends on the TTL (Time to Live) The A records may have a shorter TTL than PTR Records.

Also, companies will tell you 24-48 hours just to cover their asses since they can't control how fast it will propigate globally. It may only take a few hours, but they don't want to tell you it will be done in like 3 hours and have you calling back complaining about it.

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