Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

How can I be sure "BCC" addresses don't show in an email I send out? Sometimes the person receiving can see all the addresses.

  • 1 reply
  • 7 have this problem
  • 12 views
  • Last reply by gild

kkirchner
kkirchner
more options

I sent out a newsletter to a list of addresses, all in the BCC field, with my own email in the "To" field. 2 of the replies had all the addresses showing in the copy of my email at the bottom. One was hotmail and one was yahoo.

I sent out a newsletter to a list of addresses, all in the BCC field, with my own email in the "To" field. 2 of the replies had all the addresses showing in the copy of my email at the bottom. One was hotmail and one was yahoo.

All Replies (1)

gild
gild
more options

I have read somewhere that some of the really old email programs did not hide the BCC addresses, but we are talking 20 year old dinosaurs here.

BCC lists are not visible to anyone other than in the sender's original sent copy. (Now, gmail removes that information from the stored 'Sent' copy)

There is nothing in the Header that shows the list, even if you 'View Source' of the message and look at the details hidden inside the message..

If there is no To: or CC: in a message, Thunderbird and some other advanced programs will show the TO; as 'Undisclosed Recipients'. Add your own address to the BCC: field and receive a copy of the message and compare it to the original. ...as long as you are not using gmail!

TB-38.2 Win10-PC

added text

Modified by gild