Email marketing experts recommend that you always ask your subscribers to “please add me to your address book” on your opt-in thank you pages and your welcome emails to prevent spam filters from blocking your emails.

It’s good advice.

MailChimp is taking that idea slightly further by including an “Add-to-Address-Book” link to your email campaigns and opt-in process.

We’re using microformats (an emerging technology being used more and more in “Web 2.0″ apps) along with a little dose of good old fashioned vCards…

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