Re: Can someone recommend a product?

Larry Coon wrote:
I don't even know what this feature is actually called, but I've
seen it in several places. It's the one where the web site shows
a word or a string graphically, and the user has to enter that
string before the site will allow them to proceed. For instance,
ticketmaster.com uses it to make sure it's a person buying tickets
and not a bot.

Does someone make a similar product that installs as an extension
to Exchange Server? Ideally, it would:

-- If an e-mail comes in, the server replies with an e-mail
asking the sender to enter a string as described above.

-- If the user enters the string, the e-mail is sent to the
recipent's inbox. If not, then it's discarded.

-- Once a sender has verified him/her self in this manner,
he/she won't be asked again.

-- The admin can pre-load addresses, domains, etc., that will
be automatically white-listed.

Can anyone point me to such a product? Or if many exist,
recommend a specific one?

Thanks!

I know earthlink is working like this now.

I don't know of a product that does this for mail servers.
However, there is an email server that can do very similar things for you. It's called Postfix www.postfix.org
It's a very popular product on unix/linux servers. It's used a lot as a gateway MTA. It scans for viruses, spams, all sorts of system checks like what you describe above.

Since it runs on unix/linux, it's very stable and isn't prone to security/virus problems. It's security record is one of the best in the industry. I did work at AIG (insurance company) with 2 postfix servers running on solaris. Load-balanced with dns round-robin. Approx 3 million emails per month.

Postfix scanned for viruses and spams, then relayed 'clean' emails to exchange, lotus and groupwise servers. AIG is a big company, they have all sorts of systems running internally.

Running virus scans and spam checks on gateway running postfix costs much less $$ than adding similar products to exchange. It all depends on how many users you have.

Postfix = free, unix (solaris) or linux (redhat, suse, ubuntu) = free.
spam filter = free (spamassassin), antivirus = free (clamav) or you can get commercial grade (very good one) for $299 per year for up to 6000 users - www.centralcommand.com

This costs much less $$ than similar things on exchange. Postfix is very flexible - can talk to ldap (it talks perfectly to active directory, edirectory).

hope this helps,

Oskar


.

Relevant Pages

  • Re: Exchange 2003 Enterprise install (with upgrade to Exchange 2007 to follow fairly quickly) hardwa
    ... How long is a piece of string? ... You do not mention how many users you plan to have on your servers. ... This will be the only Exchange Server 2003/7 in the forest for the time being. ...
    (microsoft.public.exchange.design)
  • Re: List SQL servers in a network
    ... > private static extern short SQLAllocHandle(short hType, IntPtr ... > public static string[] GetServers{ ... > throw new ApplicationException("Unabled to aquire SQL Servers from ODBC ...
    (microsoft.public.dotnet.general)
  • Re: SQL Agent Job CmdExec - .net Console Exe Fails
    ... The local system account won't be able to authenticate to other servers. ... test_demo_in_dataLoad.demo.Lists.GetListItems(String listName, String ... viewName, XmlNode query, XmlNode viewFields, String rowLimit, XmlNode ...
    (microsoft.public.sqlserver.server)
  • Re: [SLE] getting mail to use the smtp server
    ... Sending from different accounts is more ... different smtp servers, acording to the identity used to write the email. ... now postfix seems to admit configuration of different smtp ...
    (SuSE)
  • Re: Cluster Postfix
    ... servers, all with equivalent priority so that connections are spread out, ... On Wed, July 19, 2006 1:17 pm, Anmol Bedi wrote: ... Can somebody guide me how to setup postfix / qmail cluster solution so as ...
    (RedHat)