As part of our pro-active approach to security, we sometimes make configuration changes on our Network. Unfortunately, in this instance, a small configuration change we made late on Friday night had an unforeseen side-effect.
This resulted in some legitimate incoming emails sent to us being "bounced back" to the sender either as a hard failure, or as a notification that there was a problem delivering the email, but that further automatic attempts to send will continue.
An example of such a notification is illustrated below:
As of 20:00 UTC on Monday 20th July, this mis-configuration has now been corrected, and we apologize for any confusion, inconvenience, or concern caused.
If you've emailed us during the above period and received a "warning/retrying" response in return, it's likely that we've now received (or will shortly receive) your original email. Our team will respond to your query promptly.
If however you've emailed us during the above period and received a "mail delivery failure" response in return, please reach out to us again.