At SendGrid, we offer watching a whole dedicated domain/subdomain. For instance, you set up the MX record for incoming.example.com to sendgrid.net, and we Parse everything and POST it to the URL of your choice.
As a SendGrid Support Technician, I can tell you our Parse API retries for 72 hours, same as our outbound mail management. We use POST params, not JSON: http://docs.sendgrid.com/documentation/api/parse-api-2/
Our Parse API is complimentary, and doesn't use any credits.
We also have POST pushing of live data such requests received, deliveries, bounces, clicks, and opens down to address/link/time-specific detail. This is offered as either JSON strings or POST params: http://docs.sendgrid.com/documentation/api/event-api/
Hi, this is Jacob, from the Support Team at SendGrid. We caught the phisher, and the URLs shouldn't be resolving any more. If you're seeing a URL that's still resolving, please email it to us at [email protected] If you can attach the whole original email file, that'd be fantastic too.