Phishing warning at representative's end

[MyfanwyNixon]

A user writes:

I've used your service to contact my local councillors recently and was advised by one of the councillor that the email sent to them triggered a "Phishing" warning message at their mailbox.

This is just to notify you as this may affect other councillors getting emails from the service.

maybe one for @sagepe to take a look at?