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Content Rejected

Have you been having issues with sending email to mailboxes hosted by and receiving 550 content rejected non-deliverable error messages? has investigated and found that there are newer versions of Microsoft Word which were released by Microsoft containing a placeholder URL instead of the Microsoft Smart Tag URL. The placeholder URL was blacklisted by spam organizations and so any email with Microsoft Word attachments could not be delivered. has removed this URL from our blacklist so that email traffic through our servers will be allowed.