Re: New mailing list notice seen as "junk" by gmail

[Peter Cawley <lua@...>]

On Sat, Aug 28, 2010 at 9:44 PM, Chris Babcock <cbabcock@asciiking.com> wrote:
> On Sat, Aug 28, 2010 at 8:51 AM, Alexandre Erwin Ittner
> <alexandre@ittner.com.br> wrote:
>> Does Gmail have some kind of whitelisting procedure for legit lists?
>>
>
> There are the bulk senders guidelines, but (as an admin of a play by
> email game server) my observations indicate that Gmail applies content
> filters a little differently than other web mail providers. Most mail
> providers apply filters when mail enters the system. Once labeled as
> Spam or accepted as not-Spam, that label is on that message until the
> user changes it. Marking mail as Spam or not-Spam trains the filter,
> but it doesn't affect decisions that have already been made. Gmail
> seems to defer content filtering until a user access the account,
> because it appears that flagging other users have done on by reading,
> replying to or explicitly removing the Spam label has an affect on how
> messages are tagged for later readers, even if the message that is
> read later is sent earlier.
>
> So legitimate lists get whitelisted by being read.
>
> Chris Babcock
> USAK Judge Keeper
> Cure-ator of Schrödinger's Ham

It may also be useful to note the output of
http://www.intodns.com/lists.lua.org which indicates that there is no
RDNS for the MX server used by the list. I may be wrong, but I have
the feeling that many mail providers like GMail respond very badly to
missing RDNS records.