IPv6-working freemail status

[Emanuele Balla]

On 1/14/10 10:58 PM, Gert Doering wrote:

>> Some mail filters unfortunately consider MX hosts resolving to IPv6 
>> addresses as invalid and the message is rejected because of 
>> that.  
> 
> Can you name some specifics?  I've had an MX with IPv6 record since
> 5 years or so, and have not encountered mail unreachables due to that.

At least some versions of Barracuda stuff out there seem to misparse
Received headers and claim some random IPv6 address as blacklisted by
${RANDOM_DNSBL}.

I see this happening once a week, more or less, in my customers
complaints. Not much of an issue, anyway.

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