One of the key IP reputation services appears to have blacklisted both of our outgoing servers which is causing issues for some email customers. We have noticed this occurring for any emails destined for icloud.com or mac.com email addresses, however some other servers may be affected. We have contacted the service in question requesting that we are unblocked. We will update this status page as any updates become available.
We have adjusted our outgoing servers to use different IPs to circumvent the block. We would now suggest that mail customers attempt to resend any failed messages.
We are seeing this again unfortunately. We are investigating the cause of this, however we may have to wait for any blocks to expire.
We've applied a work around for the time being and sending email should be fine. We'll investigate the cause of why we were blocked in the first place and why our normal methods for blocking junk email in the first place did not work this time.