| Author |
Message |
FrankH
Guest
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 Posted:
Wed Jan 26, 2005 6:43 pm Post subject:
Error 550 wanted! |
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I run an Exchange 5.5 SP4 (under NT4) hosting emails for multiple
domains. The email server is configured to accept SMTP for only those
domains, and it works quite well.
What I'm looking for is a way to have the SMTP server reply with an
error 550 when a user does not exist for a local domain, instead of
accepting the message.
When I send a message to john@mydomain.com, the email is accepted in
the SMTP session, and later returned to the sender if john@ does not
exist. This way, it looks like I accept email for any user @mydomain.com.
Is there a way to return the 550 error in the MX SMTP session, when
the message is for the local domain, but the user does not exist?
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Rui J.M. Silva
Guest
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| Posted:
Wed Jan 26, 2005 8:28 pm Post subject:
Re: Error 550 wanted! |
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I don't think that's possible natively.
If you are worried about spam havesters, maybe you could do some tarpitting.
There's lot of information for doing tarpitting with Exchange 2003, but with
5.5 I don't know if it is possible.
--
Blog "subject: exchange"
http://spaces.msn.com/members/ehlo
"FrankH" <FrankH@discussions.microsoft.com> escreveu na mensagem
news:FF437665-F35F-4F52-840A-A46A0FC5D1B7@microsoft.com...
| Quote: | I run an Exchange 5.5 SP4 (under NT4) hosting emails for multiple
domains. The email server is configured to accept SMTP for only those
domains, and it works quite well.
What I'm looking for is a way to have the SMTP server reply with an
error 550 when a user does not exist for a local domain, instead of
accepting the message.
When I send a message to john@mydomain.com, the email is accepted in
the SMTP session, and later returned to the sender if john@ does not
exist. This way, it looks like I accept email for any user @mydomain.com.
Is there a way to return the 550 error in the MX SMTP session, when
the message is for the local domain, but the user does not exist?
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| Back to top |
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FrankH
Guest
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| Posted:
Thu Jan 27, 2005 3:33 pm Post subject:
Re: Error 550 wanted! |
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Thanks for your reply.
I need this function for a specific reason: I'm going to use Postini
antispam services, and I would like to use the so called SMTP auto-create
feature of them. If my exchange server would reply with an error 550 to a
non-existing rcpt to: address, then the non-existing e-mail account will not
be auto-created in Postini. Now, with my exchange server replying with 250 OK
to 'fake-address'@mydomain.com , Postini will accept this as a valid address
and auto-create an account. That's not good.
"Rui J.M. Silva" wrote:
| Quote: | I don't think that's possible natively.
If you are worried about spam havesters, maybe you could do some tarpitting.
There's lot of information for doing tarpitting with Exchange 2003, but with
5.5 I don't know if it is possible.
--
Blog "subject: exchange"
http://spaces.msn.com/members/ehlo
"FrankH" <FrankH@discussions.microsoft.com> escreveu na mensagem
news:FF437665-F35F-4F52-840A-A46A0FC5D1B7@microsoft.com...
I run an Exchange 5.5 SP4 (under NT4) hosting emails for multiple
domains. The email server is configured to accept SMTP for only those
domains, and it works quite well.
What I'm looking for is a way to have the SMTP server reply with an
error 550 when a user does not exist for a local domain, instead of
accepting the message.
When I send a message to john@mydomain.com, the email is accepted in
the SMTP session, and later returned to the sender if john@ does not
exist. This way, it looks like I accept email for any user @mydomain.com.
Is there a way to return the 550 error in the MX SMTP session, when
the message is for the local domain, but the user does not exist?
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| Back to top |
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