Code:
Dec 26 19:24:24 colo50 postfix/smtp[15168]: EDB8016001D09: to=<jeremy@jeremyporn.com>, relay=mail.jeremyporn.com[74.52.237.124], delay=3, status=bounced (host mail.jeremyporn.com[74.52.237.124] said: 550-Verification failed for <www-data@colo50.mia.colo-cation.com> 550-Previous (cached) callout verification failure 550 Sender verify failed (in reply to RCPT TO command))
As for mail from the board, turn off your reverse sender verification which appears to be failing for some reason, or whitelist colo50.mia.colo-cation.com. I would assume it is the same problem with link-o-rama as the actual machine that sends the mail is not the primary mx for emails.