Go to settings --> general settings and uncheck 'Activate the customer portal'. It will solve your problem.

If you cannot send emails after uncheck this, pleas read this...

help.openerp.com/question/26089/portal-disabled-cannot-send-emails/

When you uncheck 'activate customer portal', the customer portal will be deactivated. If you still want to use the portal, but not send the info in every mail, you need to keep the 'activate customer portal' checked. You can't change it in the templates either, because the portal info is added thru code. We spent a lot of time to remove this, but finally managend. Check the code for append to html and expect to find some ugly programming...

Go to Settings -> Technical -> Email -> Templates and edit the email template you are using so that to remove the text 'You can access our customer portal'. Save the edits.

Remove 'You can access our Customer Portal' from email

I found a solution for this:

Go to Settings - Translations - Application Terms - Translated Terms

Go to the search field and do an advanced search for "Old source" contains "Access your messages and personal documents"

Change the translation value for all languages, including English to this value: "<br title="%s"/>"

Save the translations and synchronize all languages in Settings - Translations - Application Terms - Synchronize Terms

The text and link is gone in the emails now.

Or you can edit your email templates: Settings->Technical->Email->Templates if you're having issues. When editing the templates, you can remove the unwanted line.

Use this module - https://apps.odoo.com/apps/modules/8.0/colors_customization/ - not only to remove but also modify email footers as you like (incl direct Odoo links to objects)

I am looking for the answer for "how to remove

Access your messages and personal documents through our Customer Portal

From the emails sent from openerp?" . Anyone plz help.