How to prevent getting labelled as a spammer by google if you are using gmail as the mail server on your site?
Traffic to my site surged a few days ago. As a result the amount of emails my site has been sending has surged as well. At times several emails are being sent each minute and on average an email is being sent every couple of minutes. I setup gmail to send all of the emails and now they think I am spamming or maybe I hit some limit and they require me to fill out a captcha from time to time. Once I fill out this captcha my site is able to email again, but after a while google requires another captcha to be filled and my site ceases to mail again. What can I do to prevent this? How do I let google know that this is not spam?

Thanks
How to prevent getting labelled as a spammer by google if you are using gmail as the mail server on your site?
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Traffic to my site surged a few days ago. As a result the amount of emails my site has been sending has surged as well. At times several emails are being sent each minute and on average an email is being sent every couple of minutes. I setup gmail to send all of the emails and now they think I am spamming or maybe I hit some limit and they require me to fill out a captcha from time to time. Once I fill out this captcha my site is able to email again, but after a while google requires another captcha to be filled and my site ceases to mail again. What can I do to prevent this? How do I let google know that this is not spam?

Thanks