How do I NOT display recipients email addresses?

Thanks for the reply, but perhaps I didn't clearly explain the problem. I wish to ensure that all the email addresses are not readable by the RECIPIENTS.

It is quite wrong, and in fact illegal in the UK, to send out email addresses in this way. (That's how Spam happens)

Surely what you are suggesting does not change that? At the moment I am displaying only the BCC field when composing, and this contains only the Group name. I also Mail To myself to receive a copy as sent to the Group. The CC address field is hidden, i.e. not selected

Are you also saying that unticking the box in Preferences/Composing/Addressing/Show all the addresses/ does, or does not work now. It certainly isn't working consistently for me. A secondary question about this is whether this applies to a Group when it is being CREATED, or to the mail when it is being composed? I feel that my results are inconsistent, for sometimes the recipient sees "To undisclosed recipients", and sometimes a list of names.

Your help appreciated.

Thanks again for your effort.

I confirm that I am using SMTP, and that all else seems to be functioning correctly. This problem has only come to light because we are trying to tighten-up on security. I am truly fed-up with SPAM messages and seem to relate them directly to the occasions that whole lists of names have been sent out using the TO field.

Your answer is simple and to-the-point, and must be right. I shall persevere and see what I am doing wrong.

How much easier life would be if NOT displaying email addresses of Group members were the Default setting, for no one seems to understand what they are doing when theuy use the TO field.

😊