Setup an RSS campaign
Took awhile for MailChimp to recognize that my RSS feed was valid.
Used Feed Validation Service from W3C
It says the feed is valid … Tried it a couple of times and did have it error once or twice.
Success
After scheduling a post for 3am in WordPress & then having MailChimp check it at 4am, I received a successful email …
Follow up edits
Needed to make a change to the feed. Only wanted an RSS feed that
was tagged with a particular name.
Used /tag/*what ever the unique tag is*/feed … Edited the MailChip feed and it updated without an issue.
Related:
http://kb.mailchimp.com/campaigns/rss-in-campaigns/troubleshooting-rss-in-campaigns