SMTP error from remote mail server after end of data:
552 5.2.0 XgK0lpDozbWn7 :DED: Access to this mail system has been blocked for 188.8.131.52 due to spam activity. Spam was seen coming from this IP, and possibly other scripts running on it. For help resolving the issue, see http://x.co/spamclean. Once the compromise has been cleaned, please contact customer support to remove the block.