judgecorp writes "For three days, customers at British ISP Sky have been receiving a flood of old and deleted messages. The problem started when the company switched its email provider from Google to Yahoo. As it began to move accounts from one provider to another, it became obvious that the new provider could not tell which emails in the old system had been sent or deleted. Some users had up to 8000 old messages. The incident has been going for three days, as users are migrated. Sky is apparently unable to fix the problem — its best advice been to suggest users delete the old messages."