IT Company Singapore reserves the right to block incoming email from any remote SMTP relay at any time for any reason. If a remote SMTP relay is misconfigured, spammers will often exploit the remote relay to send thousands (sometimes millions) of spams. If a spammer is abusing a remote SMTP relay to mail bomb domains at IT Company Singapore, IT Company Singapore will immediately block the IP of the SMTP relay that the spammer is abusing. IT Company Singapore also subscribes to multiple RBL’s (real-time blocking lists) to automatically block known open SMTP relays and known spamming relays. While this policy dramatically reduces the amount of spam sent to IT Company Singapore, this may inadvertently block some legitimate email.