>So, ISPs not doing reverse DNS for IPv6, like my current ISP, are making it >impossible to use your own mail server to deliver mail over IPv6. I think >they are doing a serious disservice to the open internet.
That's a separate conversation. If your ISP allows you to run a mail server on the service you buy, they have several options for how to populate rDNS records, as listed in the document. If they do not, then they still have options for how (or whether) to populate PTR records. For what it's worth, MAAWG and BITAG (among others) recommend blocking port 25 unless you know there's a mail server there. https://www.m3aawg.org/sites/default/files/document/MAAWG_Port25rec0511.pdf http://www.bitag.org/documents/Port-Blocking.pdf Lee ________________________________ This E-mail and any of its attachments may contain Time Warner Cable proprietary information, which is privileged, confidential, or subject to copyright belonging to Time Warner Cable. This E-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this E-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this E-mail is strictly prohibited and may be unlawful. If you have received this E-mail in error, please notify the sender immediately and permanently delete the original and any copy of this E-mail and any printout.
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