A forum-like app I'm working on will send an email notification to the thread starter when a new replied is received. It would be nice if the owner can just reply the email to add a new reply to the thread.
How can I implement the feature, i.e. "reply to this email to comment" like Facebook?
Option A: scan the subject line/body? I don't like it 'cause what if the user modified the subject line by mistake?
Option B: use a unique reply-to e-mail address that links to the thread ID. Is this a common function for mail server? like set up a *@addComment.domain.com ? Or does the app server needs to setup a new email account before sending the email with reply-to?
Any other options?
Thanks!