Fetching of mails in third party iPhone application

I am trying to fetch all my gmail account mails in my iphone a开发者_如何学Gopp. Is there any third party API which provides me some help on this. I am trying to use pop3 but not found success. Mail sending from third party app without using iphone default library is succeed using SMTP. Can we do such kind of thing for fetching mails also.

Thanks in advance.

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I would recommend looking into this.