UPDATE: We have temporarily disabled Spamcop to allow emails come in our servers.
We received complaints that Yahoo users cannot send emails to our servers. The main reason is Spamcop, a legitimate SPAM detection service, has determined several Yahoo email servers were spamming the internet and have included the IPs in the blacklist. It is the duty of Yahoo to maintain their servers clean and coordinate with Spamcop but there has been a lack of care coming from Yahoo! A discussion thread at http://uk.answers.yahoo.com/question/index?qid=20110330052107AABXnI1 shows that Yahoo has not been addressing the problem since March 2010. Please be guided accordingly. Thank you.