Multiple A Records - Followup Question

[Matus UHLAR - fantomas]

>>> IOW, can a given *IP* appear in more than one A record? I realize
>>> that this does have the problem that the reverses would resolve to
>>> hostX not
>>> test

>On 2016-10-02 12:59, Reindl Harald wrote:
>> on IP should only have on PTR - period
>>
>> avoid anything else than PTR/A-matching if the machine is supposed to
>> send outbound mail

On 02.10.16 20:42, David Ford wrote:
>it is very helpful to have multiple PTR records for an IP on a mail
>server so anti-spam engines can accurately make fully verified forward
>and reverse lookups not just for DNS but also certificate verification.
>
>mail servers that can't correctly emit the right EHLO for outbound email
>should remain in the 1990s.

I found it problematic, not helpful.

It's much safer and easier to have one PTR record with correct fcrdns when
sending mail than having multiple DNS records (even with valid fcrdns).

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Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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