Exchange 2003 Open Relay Q's
10 May 2006, 08:27 PM
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Exchange 2003 Open Relay Q's
I only seem to be able to find a way of blocking open relay via IP addresses which is pretty useless if the mx record points straight at the exchange box (I know this isnt ideal) is it possible to just get it to accept connections for a given domain name or does it do this by default, ie only allowing what is in the Default Recipient Policy?
David
David
10 May 2006, 09:29 PM
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Out of the box install E2k3 does not open relay iirc.
In Relaying Restrictions, you want to set the ip's you allow for anonynous external relaying, if any, and make sure the authenticated people can send mail.
This way, Authenticated users can send external. Anonymous can send to internal addresses defined in AD. Mail between Exchange servers are authenticated ones anyway.
To be 100% sure, you should connect yourself either via telnet and send the right commands or use a simple smtp mailer, easiest available is probably OE.
I think thats right... (in a rush
)
In Relaying Restrictions, you want to set the ip's you allow for anonynous external relaying, if any, and make sure the authenticated people can send mail.
This way, Authenticated users can send external. Anonymous can send to internal addresses defined in AD. Mail between Exchange servers are authenticated ones anyway.
To be 100% sure, you should connect yourself either via telnet and send the right commands or use a simple smtp mailer, easiest available is probably OE.
I think thats right... (in a rush
)
just wanted to know for definite.
12 May 2006, 11:14 AM
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12 May 2006, 11:48 AM
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Some of the anonymous tests are unable to confirm wether your mail system accepts but internally rejects certain formats of relaying so they cant really use this to create a list. I've used this site for years to test different mail configs and have had no problems with black listing.
Jules
Is abuse.net a blacklist of abusive domains or providers?
Abuse.net is not a blacklist, blocking list, or anything of the sort, and has nothing to do with blocking or rejecting mail. If someone told you that abuse.net was blocking your mail, you've been misinformed.
Listing a domain in the abuse.net database does not imply that the domain has ever done anything abusive. The majority of the entries in the abuse.net database of domain contacts were submitted voluntarily by responsible providers and domain managers. You can't conclude anything about the fact that a domain appears in the list other than that we have some idea of who the contact is.
Jules
Is abuse.net a blacklist of abusive domains or providers?
Abuse.net is not a blacklist, blocking list, or anything of the sort, and has nothing to do with blocking or rejecting mail. If someone told you that abuse.net was blocking your mail, you've been misinformed.
Listing a domain in the abuse.net database does not imply that the domain has ever done anything abusive. The majority of the entries in the abuse.net database of domain contacts were submitted voluntarily by responsible providers and domain managers. You can't conclude anything about the fact that a domain appears in the list other than that we have some idea of who the contact is.
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