Yikes, didn't notice that happened by I know why. The mail queue on impalaforums.com had noticeably halted months ago, most likely when I installed some mail modifications on the way the queues work when the site sends e-mails. Today I was trying to send an e-mail concerning the new Garage and notice I had make a mistake when previously working on the mail system. When I fixed it, it must have unclogged all the outgoing mail that was in queue for months, thus dumping everyone with old mail.
I apologize for this.
Also on a site note, you can go into your User Control Panel and edit whether you want to automatically subscribe to threads. Having automatic subscription will send e-mail updates every time someone replies to a post that you had previous had posted in. By default new members have this feature turned off.