How does Exchange 2010 prevent auto-reply loop?

Question

E.g., 2 users have auto-reply configured. User A sends a message to User B. User B's auto-reply gets sent to User A's mailbox. That, in turn, causes an auto-reply to be sent from User A and insanity ensues.

How does Exchange 2010 prevent this scenario?

Also, can Exchange 2010 prevent a user's mailbox sending more than one auto-reply to the same user in one day?

Bonus: Assuming Exchange prevents this, how do I configure the settings?

Why would you want to configure it? It works fine. Use your time on problems :) — pauska, Jun 06 '11 at 17:31
I just want to know what options are available. We are migrating from another mail system and administration might want to reproduce the way our current system works. — Belmin Fernandez, Jun 07 '11 at 12:12
@Pauska: do you mean use your time to solve problems or make more? I'm pretty good at both. — Bart Silverstrim, Jun 07 '11 at 16:39

score 11 · Accepted Answer · edited Jun 30 '16 at 11:40

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Auto replies only get sent once per sender, per activation. There is no auto-reply loop with Exchange systems. Microsoft KB

edited Jun 30 '16 at 11:40

alanjmcf

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answered Jun 06 '11 at 17:23

Holocryptic

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To be clear, they are sent once per Sender. – joeqwerty Jun 06 '11 at 17:26
Thanks @joeqwerty, I was trying to find the right term... I'll change it. – Holocryptic Jun 06 '11 at 17:26
Glad to pitch in. – joeqwerty Jun 06 '11 at 17:28
Thanks gentlemen. Do you know of any official documentation of this behavior? – Belmin Fernandez Jun 07 '11 at 12:21
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added link for referrence – Holocryptic Jun 07 '11 at 14:33
Sir is mildly appropriate :) – Holocryptic Jun 07 '11 at 16:42
@Holo: That comment made me chuckle. :) – joeqwerty Jun 07 '11 at 23:25
@joeq which one? The one where he's unsure of my gender, or my response to said gender confusion? :) – Holocryptic Jun 07 '11 at 23:39
@Holo: Your response to the aforementioned gender question was... as they say... priceless. – joeqwerty Jun 08 '11 at 02:51

score 7 · Answer 2 · answered Jun 06 '11 at 17:31

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the header is x-auto-response-suppress:all is sent by default on auto replies. That in conjunction with x-ms-exchange-inbox-rules-loop (which contains the sender email address), should resolve any potential loop conditions.

answered Jun 06 '11 at 17:31

Jim B

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So another system could also use this header to prevent an auto reply loop correct? – Belmin Fernandez Jun 07 '11 at 12:14
not that I am aware of – Jim B Jun 07 '11 at 12:32
Exchange often strips Exchange-specific headers as messages leave the organization, @Beaming, so you need to find out whether this header is stripped. – james.garriss Feb 21 '13 at 19:44

score 1 · Answer 3 · answered Jun 21 '12 at 20:41

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You can get around the one per sender restiction. In auto reply create a rules and a template and set as reply to all The sender will receive 2 emails on first contact. Then just one on second contact.

answered Jun 21 '12 at 20:41

Theruetwo

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How does Exchange 2010 prevent auto-reply loop?

3 Answers3