read mailbox programmatically

[Emmanuel dreux]

Hi,

I have a simple question : what api should I use to entirely read a mailbox programmatically?

I've found this link ( http://yellowduckguy.wordpress.com/2007/09/02/how-to-read-gmail-email-programmatically/) but I wonder if there are Google APIs for that?

Do you have a sample that you could share?

Thank you very much.

[Claudio Cherubino]

Hi Emmanuel,

You have 3 options to read a mailbox programmatically:

1) the Gmail Inbox Feed (http://code.google.com/apis/gmail/docs/inbox_feed.html) which is also the solution described in your link, but that only lists the newest unread messages

2) use a standard IMAP client (http://code.google.com/apis/gmail/oauth/). Please take into account that the Gmail IMAP servers are extended to support OAuth for authentication (samples at http://code.google.com/apis/gmail/oauth/code.html)
3) use the Apps Script Gmail Services (http://code.google.com/googleapps/appsscript/service_gmail.html) 

Claudio

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[Cooper Marcus]

One more option: http://context.io/ - may cost money, though probably not much, and is likely to be much easier to implement.

Full disclosure: My only relationship with Context.io is as a happy customer

[Emmanuel dreux]

Thanks Claudio,

this might not be the best forum to follow up my issue. Don't hesitate to propose another place if there is a better forum.

We have finally implemented IMAP to retrieve an entire mailbox but we have an issue with messages that have more than one labels.

They are downloaded twice, if they have 2 labels and there would be a huge performance impact if we download all mails several times.

Is there anybody that has faced this problem? If so, how have you adressed it?

Thanks.

[Jay Lee]

Hi Emmanuel,

  You can retrieve all the messages from the "All Mail" folder via IMAP and use the X-GM-LABELS Gmail IMAP extension to find out what labels each message has. This means you'll only be grabbing each message once.

http://code.google.com/apis/gmail/imap/#x-gm-labels 

The only messages this won't get is whatever is in Trash or Spam, those you'll need to grab separately if you need them.

Jay