I just discovered a handful of log entries for emails that were not delivered to discourse. This is the error apparently returned to users:
Email can not be processed: Sorry, new users can only put 2 links in a post.
I just changed this setting to 9999 (or should I have left it blank?) to prevent this from happening in the future.
However, now I have all these emails going back a few months that never made it to discourse. Is there a recommended way to process the messages again?