We're aware of problems with our clients being blocked from sending messages to Google Mail accounts and receiving: "Undelivered Mail Returned to Sender" emails.

We are working on the issue - please keep trying to send your emails once every 24 hours.

A further update will be posted when the issue has been resolved but we're at the mercy of Google at the moment.

If your message is important to your intended recipient, please contact them via alternative means.