Hi all,
Sorry for the confusion. We have a semi-comprehensive help page on
whitelisting [1] and I'll relay the relevant points here.
As Taylor said, there are per-account limits on tweets and DMs: 1000
per day and 250 per day, respectively. The daily tweet limit cannot be
raised by any whitelist, and is further broken up into sub-limits
throughout the day (to avoid users from blowing through all 1000 in a
short time). We do not reveal the specifics of these sub-limits to
prevent users from operating right at them.
Twitter accounts that are on the REST API whitelist are allowed to
send up to 10,000 DMs a day; this has likely changed since Doug's
email. This increased limit only applies to accounts, not IPs, and the
normal requirements for REST API whitelisting apply (notably, it is
restricted to developers with demonstrable special needs).

Hope this clears everything up!
Brian Sutorius

[1] http://help.twitter.com/entries/160385

On May 12, 9:52 am, Mo <maur...@moluv.com> wrote:
> Does that mean if @account has a whitelisted app, 5000 messages/day
> can be sent through that app, but each app user (say @user_of_account)
> only gets 250/day?
>
> If so, is the 100 DM/hour limit the same for both @account and
> @user_of_account, or is there a different hourly limit for @account?
>
> -Mo
>
> On May 12, 9:25 am, Abraham Williams <4bra...@gmail.com> wrote:
>
>
>
> > I read Doug's email as any account that is specifically whitelisted has 5k
> > DM and that DMs are not effected by IP whitelisting.
>
> > Abraham
>
> > On Wed, May 12, 2010 at 09:21, Mo <maur...@moluv.com> wrote:
> > > Hi Taylor,
>
> > > This is different than what Doug Williams stated in this post -
> > >http://bit.ly/cLVv1Q
>
> > > "Whitelisted users have a direct messaging limit of 5K messages per
> > > day."
>
> > > What I'm still not clear on, though, is how "user" is being defined.
> > > Is the user the app owner or the someone using the app?  Also, is 5K
> > > DMs a day stated by Doug correct or is it 250 DMs?
>
> > > Apparently Alex and I posted essentially the same request 5 minutes
> > > apart.  Answering to either this message or to my other post would be
> > > much appreciated.
>
> > > -Mo
> > >http://www.pay4tweet.com
>
> > > On May 12, 8:39 am, Taylor Singletary <taylorsinglet...@twitter.com>
> > > wrote:
> > > > Hi Alex,
>
> > > > Whitelisting only effects API call rate limiting -- so the answer to 
> > > > your
> > > > question is "no."
>
> > > > T
>
> > > > On Wed, May 12, 2010 at 8:35 AM, alex urdea <alex.urdea.fi...@gmail.com
> > > >wrote:
>
> > > > > Thanks for your answer.
>
> > > > > One more: is the 250 MD limit increased if the application is
> > > whitelisted?
> > > > > Or does the whitelist concernt the rates only? Thanks
>
> > > > > On Wed, May 12, 2010 at 5:15 PM, Taylor Singletary <
> > > > > taylorsinglet...@twitter.com> wrote:
>
> > > > >> Rate limits and limits on particular actions are different. We could
> > > do
> > > > >> better in providing a X-FeatureRateLimit header on tweets and DMs and
> > > the
> > > > >> such that have their own issuance limit -- but I can imagine 
> > > > >> potential
> > > > >> performance issues with that.
>
> > > > >> Rate limits provide a ceiling on the amount of API calls you can 
> > > > >> make.
> > > > >> Their main purpose is to keep the entire platform running smoothly 
> > > > >> and
> > > to
> > > > >> not allow any one application to spoil the resource pool for its
> > > peers.
>
> > > > >> Twitter, aside from the API itself, has limits on how many status
> > > updates
> > > > >> and DMs can be sent -- the API just respects the rules of Twitter
> > > here. If
> > > > >> you're concerned you might be hitting the upper limit, for now the
> > > best
> > > > >> thing to do would be to implement a counter in your application and
> > > queue
> > > > >> updates when your counter is full.
>
> > > > >> A user may issue 1000 tweets per day and 250 DMs.
>
> > > > >> Taylor Singletary
> > > > >> Developer Advocate, Twitter
> > > > >>http://twitter.com/episod
>
> > > > >> On Wed, May 12, 2010 at 4:47 AM, alex <alex.urdea.fi...@gmail.com>
> > > wrote:
>
> > > > >>> I'm confused:
> > > > >>> - here it says that there's a limit on direct messages
>
> > > > >>>      URL:http://help.twitter.com/entries/15364
>
> > > > >>> In the documentation page for this method you have : "API rate
> > > limited
> > > > >>> false":
>
> > > > >>>      URL:
> > > > >>>http://apiwiki.twitter.com/Twitter-REST-API-Method%3A-direct_messages
> > > > >>>  new
>
> > > > >>> Here it says that "API methods that use HTTP POST to submit data to
> > > > >>> Twitter, such as statuses/update do not affect rate limits". I guess
> > > > >>> that this is a POST method that submits data and is not subject to
> > > > >>> limits?
>
> > > > >>>      URL:http://apiwiki.twitter.com/Rate-limiting
>
> > > > >>> Which one is true?
>
> > > > >>> Thank you!
>
> > --
> > Abraham Williams | Developer for hire |http://abrah.am
> > @abraham |http://projects.abrah.am|http://blog.abrah.am
> > This email is: [ ] shareable [x] ask first [ ] private.

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