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Re:Why don't we expire passwords on the web? by lukeschlather on Monday December 13, 2010 @10:54AM (#2000792)
Email is not universally reliable enough for that to be practical.

If you leave browsers logged in, it might be a little more so, but still, I want to log in now. Not in a half an hour after the email works its way through my company's spam filters.

Re:Why don't we expire passwords on the web? by arethuza on Monday December 13, 2010 @10:58AM (#2000815)
If your emails take 30 minutes to arrive then there is something seriously wrong somewhere.
Re:Why don't we expire passwords on the web? by lukeschlather on Monday December 13, 2010 @03:19PM (#2001824)
I guarantee a considerable fraction of your users are using mail servers that have something seriously wrong somewhere.
Re:Why don't we expire passwords on the web? by bensummers on Monday December 13, 2010 @11:52AM (#2001038)
Or the server uses greylisting as part of their spam prevention mechanisms.