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out of office reply from many unknown persons
Hello
During the holidays we received a lot of out of office mails.
Unfortunately there are many people we didn't have on our recipient lists.
Only real clients should become our emails, but lot of them forward those emails to other company's and users (although they are not allowed).
Can someone help me to understand how does the out of office replay finds a way back to our Mailbox?
We are using Windows Server 2008 R2, Exchange 2012 and Outlook 2007.
During the holidays we received a lot of out of office mails.
Unfortunately there are many people we didn't have on our recipient lists.
Only real clients should become our emails, but lot of them forward those emails to other company's and users (although they are not allowed).
Can someone help me to understand how does the out of office replay finds a way back to our Mailbox?
We are using Windows Server 2008 R2, Exchange 2012 and Outlook 2007.
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Hi HelpdeskJBC,
Are the OOO emails coming from your staff, fake internal addresses or just random addresses?
Have you diagnosed the headers?
Without knowing any details, I'd chalk it up to spam. You can use SPF records set to hard fail. What type of Anti-Spam Engine are you using?
Are the OOO emails coming from your staff, fake internal addresses or just random addresses?
Have you diagnosed the headers?
Without knowing any details, I'd chalk it up to spam. You can use SPF records set to hard fail. What type of Anti-Spam Engine are you using?
This is spoofing as diverseit as responded.
How can you stop it? You can't. You can however reduce it with your OOO messages.
Since you are using Outlook and exchange, if you set our OOO for external contacts, set it to only reply to "my contacts only". By doing this, if a spammer is not in your address book, hey won't a response which helps validate your email address for them to spoof.
How can you stop it? You can't. You can however reduce it with your OOO messages.
Since you are using Outlook and exchange, if you set our OOO for external contacts, set it to only reply to "my contacts only". By doing this, if a spammer is not in your address book, hey won't a response which helps validate your email address for them to spoof.
Hello and thank you for the reply
the out of office messages are from real people some of them are also in contact with us but not on the distribution list for this kind of information we are getting the Out of Office reply from.
the out of office messages are from real people some of them are also in contact with us but not on the distribution list for this kind of information we are getting the Out of Office reply from.
OOO is from outside other companies other people (20% known people, 100% known companies)
Lets say customer A has forwarded to a fried B and both of them are on holiday --> ooo
Why do we receive the ooo from friend B? is this possible during the forwarded email?
So for the Email Program on friend B it must look like that the Email from our side is addressed to B --> so it would be normal to send ooo to us?
normally ooo should go back to the forwarder Customer A?
Lets say customer A has forwarded to a fried B and both of them are on holiday --> ooo
Why do we receive the ooo from friend B? is this possible during the forwarded email?
So for the Email Program on friend B it must look like that the Email from our side is addressed to B --> so it would be normal to send ooo to us?
normally ooo should go back to the forwarder Customer A?
This can happen for a number of reasons. Here are a few:
Any one of these can trigger and email to you if you are on one of their DGs. Hence you receiving an OOO for a recipient you never sent to. OOO responds to current sender - it doesn't matter who the email originated from.
Make sense?
Outlook Client Rules.
OOO Rules...just like Outlook Client Rules there are OOO Rules.
Transport Rules
Any one of these can trigger and email to you if you are on one of their DGs. Hence you receiving an OOO for a recipient you never sent to. OOO responds to current sender - it doesn't matter who the email originated from.
Make sense?
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There isn't much you can do about it.