Thanks Scott,This is already the approach I've followed and it worked. I
created a contact (CSV) file and imported it into a gmail account. It was
around 1700+e-mail addresses which correspond to one segment of the
customers. I got the list and I copied them and started to omit the
information I don't need. But when I tried to work with the second group in
order it didn't work as there're 30,000+ e-mail addresses. I tried to split
them into 2 groups, it didn't work. Simply the gmail and Yahoo! are not able
to import them due to the large number.
I didn't get your concern about the ethics and privacy. I didn't crawl those
e-mails or buy them. They're our customers and we want to invite them to our
page. They gave us their e-mail addresses so willingly and I guess we're not
misusing them.
Kindly, clarify.
Thanks for your reply,

On Wed, Aug 19, 2009 at 10:48 PM, Scott Haneda <> wrote:

> I'm not sure the API can do it, someone here can better answer that.
> I'm not sure the ethics and terms of this, someone here can better answer
> that.
> In a roundabout way you can do this. Create a gmail account. Import your
> list into gmails address book. Login to your Twitter account and tell the
> account settings to use your gmail account to locate Twitter users based on
> your gmail address book.
> With a large list like this, you may have to break it up into batches. You
> may also be plauged with manually adding them once you see the matches on
> screen. I can not remember if there is an "add all" feature.
> Do a small test of 100 adresses.
> From there, it is basic API calls against your Twitter account to do as you
> see fit within the terms of the Twitter API and service.
> I do not think it is possible to query email address data in Twitter other
> than by the above method with gmail, and a few other providers. Email
> addresses are private, as they should be.
> --
> Scott
> Iphone says hello.
> On Aug 19, 2009, at 8:07 AM, arawajy <> wrote:
>> Dear Developers,
>> I have a list of 400,000 e-mail addresses of my clients. I want to
>> know "Is it possible to develop a script to check if they have a
>> twitter account or not?". I will then want to generate 2 separate
>> lists based upon the result; one for the twitter users and one for the
>> non-twitter users. I want to only invite the users and create a custom
>> invitation message. Is it possible to check if the e-mail address's
>> owner is a twitter user or not? provide details please.
>> Thanks and Regards,
>> Mahmoud


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