When you use Outlook 2003 and set Word as your email editor or use Outlook 2007, 2010 or 2013, it's easy to change signatures on your messages. If you use multiple email accounts, you can set a signature for each account and it's changed each time you change the account, provided you have a default signature configured for each account.
First, create a signature for each account:
Browse to Tools, Options, Mail format, Signature section and click the Signature button to add signatures.
Click the New button to enter the text for your signature.
If you don't want to use a signature with an account, create one called Blank. Enter two dashes and a space (– ) then Enter to create a signature that is identifiable. While you could just enter a space or two, it makes it easier to locate the signature block when it's marked with the standard signature delimiter of –. This makes it easier when you right click to swap signatures or if you are having problems with spell check seemingly not working correctly (Outlook signatures and spell check).
When you are finished creating signatures, click Ok to return to the Options dialog screen. Set a signature for each account and for both new message and replies / forwards, using the Blank signature when you don't want a default signature.
Signature files are stored at
C:\Documents and Settings\username\Application Data\Microsoft\Signatures
There are three files for each signature – one each in HTML, plain text, and RTF format. You can copy these files to back up your signatures or copy them to/from another computer.
When you use the Outlook editor, you can't change signatures as easily and signatures won't change for the account, as they do with Word as the editor.
Published January 12, 2011. Last updated on June 4, 2014.