Re: Relay mail for external users

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From: Jeff Gross (anonymous_at_discussions.microsoft.com)
Date: 02/03/04 

Date: Tue, 3 Feb 2004 12:22:37 -0800

Thanks for the info - very helpful.

Jeff

>-----Original Message-----
>See http://www.vamsoft.com/orf/authattack.asp
>
>Jeff Gross wrote:
>> I've been watching your post and had a question. I have
>> one Exchange Server running in house for mail but I
have a
>> couple users who are out of the office all the time
>> working from their homes. I have set them up for POP3
and
>> that works fine but I'm afraid I don't have the SMTP
open
>> relay configured properly as you recommended.
>>
>> Since they dial up to an ISP and are assigned a DHCP
>> address, I cannot just "accept" a certain address in the
>> Relay configuration tab of my SMTP virtual server. I
>> don't want to accept a subnet because it's
255.255.255.255.
>> Do I need to have "anonymous" unchecked in
authentication
>> for my SMTP server? I tried to deny all except
>> authenticated users but the users get blocked from
>> relaying mail to the Internet. I guess I'm missing
>> something - please help or refer me to something/someone
>> for answers.
>>
>> Thanks,
>>
>> Jeff
>>
>>
>>> -----Original Message-----
>>> Make sure you have disabled open relay and also
authenticated relay
>>> through your Exchange server, or you will likely be
used as a
>> spam relay.
>>>
>>> See
>>>
http://www.winnetmag.com/MicrosoftExchangeOutlook/Article/
>> ArticleID/7696/MicrosoftExchangeOutlook_7696.html
>>> for help.
>>>
>>> anonymous@discussions.microsoft.com wrote:
>>>> I am running 5.5, I have thought It through and my ISP
>>>> said that I can let the cleints relay through them and
>>>> they can pick up mail from my server. This will also
>>>> prevent us from being used as a relay.
>>>>
>>>> This works fine.
>>>>
>>>> Thanks for you speedy reply.
>>>>
>>>> Regards
>>>>
>>>> Aaron
>>>>> -----Original Message-----
>>>>>
>>>>> If you are allowing people to relay with your
server, you should,
>>>>> otherwise anyone will be able to relay mail through
it which will
>>>>> get you blacklisted.
>>>>>
>>>>> Which version of Exchange are you using and I will
try to help from
>>>>> there.
>>>>>
>>>>>
>>>>> --
>>>>> Michael Barta [MSFT]
>>>>> Microsoft Exchange Support
>>>>>
>>>>> Please do not send e-mail directly to this alias.
This alias is for
>>>>> newsgroup purposes only.
>>>>> This posting is provided "AS IS" with no warranties,
and confers no
>>>>> rights.
>>>>>
>>>>> <anonymous@discussions.microsoft.com> wrote in
message
>>>>> news:559b01c3e4ea$b703b6e0$a601280a@phx.gbl...
>>>>>> My server deos not require Authentication.
>>>>>>
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> There is a setting on the client that says "My
>> server requires
>>>>>>> authentication." be sure that this is selected.
>>>>>>>
>>>>>>> --
>>>>>>> Michael Barta [MSFT]
>>>>>>> Microsoft Exchange Support
>>>>>>>
>>>>>>> Please do not send e-mail directly to this alias.
This alias is
>>>>>>> for newsgroup purposes only.
>>>>>>> This posting is provided "AS IS" with no
warranties,
>>>> and
>>>>>> confers no rights.
>>>>>>>
>>>>>>> "Aaron" <anonymous@discussions.microsoft.com>
wrote in message
>>>>>>> news:4ac001c3e4e8$0f421340$a301280a@phx.gbl...
>>>>>>>> Hi Everyone,
>>>>>>>>
>>>>>>>> I need help with relay mail through my exchange
>>>> server.
>>>>>> I
>>>>>>>> have 5 exteral users access the server from a
named ISP.
>>>>>>>> They all use pop3 for incoming and outgoing mail
they can
>>>>>>>> pick up there incoming mail but if they try to
send they
>>>>>>>> get a 550 error messgae saying relaying is
prohibited.
>>>>>>>>
>>>>>>>> Can someone please adivse me on the steps to take.
>>>>>>>>
>>>>>>>> Regards
>>>>>>>>
>>>>>>>> Aaron
>>>>>>>
>>>>>>>
>>>>>>> .
>>>>>>>
>>>>>
>>>>>
>>>>> .
>>>
>>>
>>> .
>
>
>.
>

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