How To Write An Email Without Seeing One's Inbox. The to box should contain the same email address of the sender on all emails recieved by anyone when all destination addresses are entered into the bcc field and none in the to field. And for emails that require more length and detail, keep it as focused as you can.

Paste all the addresses in the bcc field With paper mail, you could do this by mailing a letter without a return address from a postal drop box, but using a throwaway. Set the name ‘undisclosed recipient’ for the address you want to use for bulk emails as sender.