Here's a simple Infusionsoft campaign that you can create for yourself to route out email addresses containing the word 'Amazon.' This campaign requires a PlusThis account to build.
Learn more about PlusThis at http://www.plusthis.com/
If you need further help in building a campaign like this for yourself, please contact Infusionsoft or PlusThis for additional help and support. This campaign utilizes basic Infusionsoft and PlusThis functionality, so we made this video as a starting point for you to understand how to build a campaign to exclude Amazon customers from your Infusionsoft email marketing. Infusionsoft or PlusThis support can assist further, if needed!
To help out further, here's Infusionsoft's documentation article on HTTP Posts in the Campaign Builder: http://help.infusionsoft.com/userguides/campaigns-and-broadcasts/campaign-sequence-guide/campaign-sequence-http-post
NOTE: This method will not Suppress all past Amazon customers who have already synced into your Infusionsoft account. To do that, build and publish the campaign as described in the video, then follow the steps below using basic Infusionsoft functions: