is gmail strongly penalizing IPv6 senders?

[Jared Mauch]

I've not observed a problem with the puck.nether.net lists and google.

Then again, I don't know if stuff goes into Spam folder on the far side.

This includes:

gmail.com
googlemail.com domains
other domains hosted on google (aspmx.l.google.com)

It's also possible I have a lot of volume so am well classified as "good".

- jared

On May 30, 2013, at 10:51 AM, staticsafe <me at staticsafe.ca> wrote:

> On Thu, May 30, 2013 at 04:46:02PM +0200, Marco d'Itri wrote:
>> I have noticed in the last few days that mail sent to gmail from a 
>> significant number of our servers (both shared hosting / mail relays and 
>> dedicated servers of our customers) with IPv6 connectivity is delivered 
>> to the spam folder.
>> If there has been spamming activity (as a result of some security 
>> incident, I am not an ESP) from some of these servers then it is not 
>> recent.
>> The reputation problem is tied to the IP address, because after adding 
>> a new one in the same /64 mail is delivered to the inbox.
>> 
>> 
>> (OTOH, recently I have received significant complaints from customers 
>> about gmail rejecting connections or delivering to the spam folder even 
>> long after a security incident, so this may be not specific to IPv6.)
>> 
>> -- 
>> ciao,
>> Marco
> 
> Gmail is outright rejecting my MX over v6, something about "bulk mail"
> which makes no sense as this is a personal e-mail server. I've worked
> around the issue by telling Postfix to prefer ipv4 for sending.
> -- 
> staticsafe
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