Gmail warning me of phishing when I send emails with tracking enabled
I've been using the Gmail extension for 1-1 emails for about a year now. As of this morning when I try to send any emails Gmail warns me of potential phishing:
Deceptive site ahead
Attackers ont.sidekickopen08-eu1.commay trick you into doing something dangerous like installing software or revealing your personal information (for example, passwords, phone numbers or credit cards).
Disabling the extension fixes it but obviously I lose all functionality. Is this problem widespread?