When I receive an email from someone that I want to forward on...how do I delete all those email addresses that came with it?

Got to the email settings area, select forwarding or forwarding options and set up the forwarder to whatever you want. It should then send emails there instead of blackhole.

This assumes that SOME recipients are getting the messages. If so, go your address book and find the addresses for the failed recipients. Then edit or delete and reenter them when you are sure you have the correct information

Sign out of your gmail account. Create a new account.

To receive emails from the second account
Next, in order to see emails sent from your secondary to your primary account, you should set up forwarding. Keep in mind that you can also forward emails from your primary to your secondary account should you want all messages from both emails in both inboxes. To set up forwarding:

1. Click the gear in the top right.
2. Select Settings.
3. Select the Forwarding and POP/IMAP tab.
4. Click Add a forwarding address in the "Forwarding" section.
5. Enter the primary email address
6. For your security, we'll send a verification to that email address.
7. Open your primary email account (signing out of the secondary account), and find the confirmation message from the Gmail team.
8. Click the verification link in that email.
9. Back in your secondary account, refresh the page.
10. Select the Forward a copy of incoming mail to option and make sure your new forwarding address is listed in the first drop-down menu.
11. In the second drop-down menu, choose what you want Gmail to do with your messages in that secondary account, such as keep Gmail's copy in the Inbox or archive Gmail's copy.
12. Click Save Changes at the bottom of the page.

Recognize the signs of unauthorized access on your email account.
An obvious indicator is when email messages appear as having been read even though you haven't read them.

Also, if you check the "Sent Mail" and "Deleted Mail" folders, you may notice messages that have been emailed or deleted without your permission.

Another sign is if the secondary email account has been changed.
Check the "Sent Mail" folder for forwards from your email account.

The email address that receives the forwards is likely to be owned by your email hacker.
The same is true if the secondary email account has been changed.

The owner is probably the person who has unauthorized access to your email account.
Check the IP addresses of the activity on your email account.

If you are using Google's Gmail service, this is as simple as logging in and scrolling to the bottom of the page.
There it will indicate the time and the IP address of the last activity on your email account.
If you click on the activity monitor, you can find even more information about the person who accessed your email account.

(If you have another email provider, you will have to contact their support for this information.) The IP address indicates the location and identity of the person who has logged into your account.

place your cursor after their name or address and hit the backspace button as needed.

What you would like to say is to forward the e-mail that you received into another person, right? Here's what you need to do:

1. Access your yahoo email.
2. Open the message that you would like to forward
3. Click the forward button and type the email address of the person that you would like to receive the message.
4. Then click Send

Once you have hit the FORWARD button, you should be able to "edit" the eMail itself. You can then remove all the names from the top of the eMail you received before sending it along ...

Be careful doing it, because sometimes you select too much to delete and it takes out the part you wanted to keep!

Your Yahoo Mail (on the account which is supposed to receive the message first) has its mail forwarding option enabled. Go to Yahoo Mail, find its options page, and look for forwarding or redirection or similar and disable it.

if the unwanted addresses are in the <to:,cc:,bc:> lines of the email you want to forward, hi-lite the address and hit delete. If you want to add addresses, just type them in and type a comma between each one. Once you have the email the way you want it hit forward (not send).