Translation clarifications

I need clarification about the following sentences:

Automatically accept user's contributions for the email updates

Does this mean, "if this user makes a contribution - any contribution - notify me about it"? Or something else?

how to login with password through external login website or use %(feedback_url)s

This is from this file and I don't understand what to put in there. Could somebody make an english-language example sentence?

Thanks!

Automatically accept user's contributions for the email updates

Appears next to checkbox in user account screens - for the adminstrator to decide - whether to allow messages be sent through emailor not. By default the box is unchecked - that way hopefully there will be less chance of spam getting into the email distribution.

Please ignore the second message how to login with... - it is not shown anywhere - it's a part of login system that will be replaced.

Thanks!