Timeout on password reset link?

Hi, is there a timeout on the password reset link? Like if somebody gets hold of an email from my account some time later, can they change my password by following the link therein?

Also, I’m having a problem where email is not sent to certain email addresses. Namely, they are not sent to addresses in the same domain as the “from” address that I set. We’re using a hostgator shared account. I feel the problem is further down than your plugin. Can you give a brief description of how your plugin sends out the emails? Thanks!