What exactly happens when I get an 'Auto-reply' return from sending an email?

I was wondering, I send a collegue an email today and immediately got an "auto-reply’ message saying they would be back in the office on Wednesday…

Does this mean my email will not be in her inbox when she returns on Wednesday? Does it mean I will have to resend my email on wednesday? How do auto-replys work?

Yes, it’s in her inbox – the auto-reply is just so you know not to expect an answer while she’s out of the office.

No, she’s just giving you the heads up to not expect an immediate response. The only way it wouldn’t be in her in-box woiuld be if she also set up an automatic forward for someone else to receive her e-mail while she is out.

An auto-reply is a simple program that checks for incoming mail and then sends a preset message to the sender in response. It does not affect the delivery of mail in any way, it’s just a heads-up that you’re not going to get a real response for a while.