I exchange emails with a third-party which always replies with me in the BCC field.
That is, when I look at their emails, they appear as
The problem is that when I then click "Reply All", the To: field contains both their email address and "undisclosed-recipients:".
If I forget to remove the latter and just send the email, I get an immediate "error email" from "System administrator" saying it obviously couldn't send the email to "undisclosed-recipients:".
Is there a way to stop this behavior? It's kind of annoying having to delete that error email every time I forget to delete "undisclosed-recipients:" (which is all the time).