Old email address used when sent to mail recipient

A friend asking for help on this:
Relocated recently, subscribe to new ISP and has a new email address.
Using Outlook Express, Win XP.
Scans a document, saved as jpg. Right-click on document and a stripdown template shows up to send the email. The document shows as attachment.
When the email is sent out, the sending email address is the old address before the new ISP (old ISP was in another state, new ISP is cable Comcast), no dial up involved.
Why is the old email address involved? Is there any settings that need to be changed in the system?
I will appreciate suggestions.

 

Method #1: Set and Reset

Open Internet Explorer, Tools, Internet Options, Programs tab. Choose your email client from the list and click Apply. If your email client is already chosen as default, choose a different one and then click Apply. Then, redo the procedure and select your preferred global default email client. When you do so, the per-user settings are erased and thus the per-computer setting is enforced (default).

Method #2: Use a utility

MS-MVP Ramesh Srinivasan has a utility 'DefaultMail' that should sort this problem: http://windowsxp.mvps.org/defaultmail.htm

Method #3: A registry fix

Use your mouse and copy the below, then paste into a New Notepad session:

Code:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Classes\mailto]
 "URL Protocol "=" "
 "EditFlags "=hex:02,00,00,00
@= "URL:MailTo Protocol "

[HKEY_CURRENT_USER\SOFTWARE\Classes\mailto\DefaultIcon]
@=hex(2):25,00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,46,00,69,00,6c,00,65,\
00,73,00,25,00,5c,00,4f,00,75,00,74,00,6c,00,6f,00,6f,00,6b,00,20,00,45,00,\
78,00,70,00,72,00,65,00,73,00,73,00,5c,00,6d,00,73,00,69,00,6d,00,6e,00,2e,\
00,65,00,78,00,65,00,2c,00,2d,00,32,00,00,00

[HKEY_CURRENT_USER\SOFTWARE\Classes\mailto\shell]

[HKEY_CURRENT_USER\SOFTWARE\Classes\mailto\shell\open]

[HKEY_CURRENT_USER\SOFTWARE\Classes\mailto\shell\open\command]
@=hex(2):22,00,25,00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,46,00,69,00,6c,\
00,65,00,73,00,25,00,5c,00,4f,00,75,00,74,00,6c,00,6f,00,6f,00,6b,00,20,00,\
45,00,78,00,70,00,72,00,65,00,73,00,73,00,5c,00,6d,00,73,00,69,00,6d,00,6e,\
00,2e,00,65,00,78,00,65,00,22,00,20,00,2f,00,6d,00,61,00,69,00,6c,00,75,00,\
72,00,6c,00,3a,00,25,00,31,00,00,00 

Having pasted the above into Notepad, do a File, Save as, FIX_MAILTO.REG

Double click the saved file FIX_MAILTO.REG and agree to the registry merge. Reboot and test.