[ExchangeList] Re: Blacklisting
- From: "Greg Mulholland" <greg@xxxxxxxxxxxxxx>
- To: <exchangelist@xxxxxxxxxxxxx>
- Date: Wed, 22 Mar 2006 09:51:37 +1100
It is possible for two mx servers (bad choice of words) mail servers to be
blacklisted on separate grounds in separate physical locations given the type
of mail they might be routing or infected with.
Michael reminded me about SURLB's which may cause an issue but i have rarely
seen it happen.
Greg Mulholland
________________________________
From: exchangelist-bounce@xxxxxxxxxxxxx on behalf of ChongJa@xxxxxxxxxxxxxxxx
Sent: Wed 22/03/2006 8:05 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Blacklisting
So if this is the case, it is possible for subdomainA to be blacklisted due to
subdomainB's actions?
________________________________
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Greg Mulholland
Sent: Tuesday, March 21, 2006 3:51 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Blacklisting
Greg is right! generally a blacklist service will black list a bank of ip's
depending on how tight they are. Having said that if these MX servers were
setup in mesh topology for backup then it is entirely possible that the same
mails which bounce around MX1 may bounce around MX2 thus causing the same
problem.
Greg
________________________________
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Greg Lara
Sent: Wednesday, March 22, 2006 6:32 AM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Re: Blacklisting
It's always been my impression that a domain is blacklisted based on it's IP
address. So if west.company.com has an independent MX record, from a DNS
standpoint there would be no association with east.company.com and therefore no
reason for the east domain to be blacklisted.
Greg Lara
________________________________
From: exchangelist-bounce@xxxxxxxxxxxxx
[mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of ChongJa@xxxxxxxxxxxxxxxx
Sent: Tuesday, March 21, 2006 2:22 PM
To: exchangelist@xxxxxxxxxxxxx
Subject: [ExchangeList] Blacklisting
Let's say you are east.company.com and you also host MX records for
west.company.com and so forth. If west.company.com was compromised and get
blacklisted, can they potentially get the root domain company.com blacklisted?
I'm thinking each domain is autonomous and only the individual domains would
get blacklisted and not the entire root. Anybody know for certain? Thanks.
James Chong
ETS Sr. Exchange Engineer
Office: 703.206.7548
Cell: 703.863.1483
chongja@xxxxxxxxxxxxxxxx
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