4 years ago when I posted that link, the GMail Help Discussion group was an
official Google support group (unlike this user group) and was open to the
public.  Now it appears it's a weird stealth group.

I cannot honestly recall what their post was about, but my advice following
the link is still valid and should work.

On Fri, Jan 23, 2015 at 12:50 PM, ironchefbadass <[email protected]>
wrote:

> Zach,
>
> Regarding your link:
>
> http://goo.gl/eBitV
>
> That is not a publicly visible page nor is there an option to join the
> group it belongs to.
>
> Is there a alternative source for this information?
>
> On Thursday, May 19, 2011 at 8:49:56 AM UTC-4, Zack Tennant wrote:
>>
>> I hate to say it, but... Did you try Googling it?  I came up with this
>> link:
>> http://goo.gl/eBitV
>>
>> Also,  You should be able to turn logging on in the firewall and/or make
>> a rule that blocks all inbound POP3; but have an account try mail fetcher,
>> then you'll see the IPs it's coming from.
>>
>> On Thu, May 19, 2011 at 07:55, joshgeake <[email protected]> wrote:
>>
>>> Hi,
>>>
>>> I've got an ecommerce company and security is stupidly important. We
>>> can't just have an open POP3 port on our WAN IP because it's against
>>> our PCI Compliance. I can however secure it against a range of IPs.
>>>
>>> So - does anyone have a list of Google's IPs that they use to fetch
>>> POP3 emails?
>>>
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