As someone who spends much time being paid unreasonable sums of money for unblocking email systems, I figured it might be prudent to present a few basic suggestions, in the event that the stress and craziness of bringing up the system may have caused skipping of one or more of the steps. :)
The providers you've listed (plus comcast.net) are looking for the following:
1. An "MX" record attached to every mail server, even if it's outbound-only
2. A reverse DNS record attached to every mail server (this is critical!)
3. An "A" record in every "MX" record-e.g., don't put just an IP address in an MX record.
4. Every mail host answers up with its "A" record name. I notice that "mail.dreamwidth.org" answers up as "dfw-mail01". It should answer up as "mail.dreamwidth.org" -OR- you should change the mail server's MX record to "dfw-mail01".
If I can be of further assistance with DNS troubleshooting, please let me know.
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The providers you've listed (plus comcast.net) are looking for the following:
1. An "MX" record attached to every mail server, even if it's outbound-only
2. A reverse DNS record attached to every mail server (this is critical!)
3. An "A" record in every "MX" record-e.g., don't put just an IP address in an MX record.
4. Every mail host answers up with its "A" record name. I notice that "mail.dreamwidth.org" answers up as "dfw-mail01". It should answer up as "mail.dreamwidth.org" -OR- you should change the mail server's MX record to "dfw-mail01".
If I can be of further assistance with DNS troubleshooting, please let me know.