We recently received a file back from Mailchimp containing bounced email addresses I want to import this list into RE and flag the corresponding email address on the constituent record as being 'Invalid Email' I can then exclude those ones from future CSV exports how can I do this?
Unfortunately IOM is unable to change the email type at this time. We do have an existing suggestion to add this functionality, and I encourage you to add your vote: Allow updating/changing the phone type.
You can flag the email as Do Not Contact using IOM, though. This Knowledgebase solution describes how to do this.
Please let me know if you have any other questions.