You ask about settings to limit relay. Here are a couple from appendix G
of the imailnt.pdf file that comes with IMail:
Setting Maximum Recipients per Message
To restrict large amounts of messages being sent at one time to
multiple users (a common characteristic of spam):
1 Locate the following key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SMTPD32\Parameters
2 Under this key, locate the registry string variable named
MaxRCPTPerMessage; if none exists, create one.
3 Set the DWORD value to the desired maximum number of
recipients. (Note that 0 means unlimited.)
4 Stop and restart the SMTP server.
Setting a Delay Between Recipients
You can set a delay between recipients within a message for relayed
external mail. This prevents spammers from taking all your CPU time;
however, it also makes your server a little slower.
1 Locate the following key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SMTPD32\Parameters
2 Under this key, locate the registry string variable named
DelayBetweenRCPT; if none exists, create one.
3 Set the DWORD value to the number of milliseconds to sleep
between successive RCPTs. (Note that 0 means no wait.)
4 Stop and restart the SMTP server.
Note:
Some servers send all RCPT lines at once without waiting for a
return. In such cases, this setting can cause problems.
Dave
In reply to 04 Aug message from [EMAIL PROTECTED]:
>Every ISP we work with (roughly 40) accepts any relay as long as
>it comes from their modem pool IP. Makes it hard to send mail from
>work addresses if they don't.
>Jonathan
>At 05:47 PM 8/4/99 -0400, you wrote:
>>True, I have also found that most ISPs are blocking e-mail not from
their
>>@ISPdomain.com, even though you are one of their dial-up customer
>>with their IP address.
>>This maybe okay (?), but it does create a "Catch-22" situation for
user of
>>other independent E-mail Services that say "use POP3 from our server
>>pop3.maildomain.com for your incoming mail, and use your own ISP's
SMTP
>>server for your outgoing mail."
>>
>>I have no problem allowing anyone to send individual (single (<10 TO:,
>>CC:, BCC:) and a valid FROM:) pieces of e-mail through my SMTP server
>>as a relay, but none of us want our systems to be tied up in knots if
we
>>select the "Relay mail for anyone" option.
>>
>>Some ISPs are also adding new E-mail rules that say that the TO: line
can
>>have no more that 20 addresses. [Boo, Hiss] Or is this maybe a hint
>>at a possible solution? Shouldn't a large number of recipients be
handled
>>by a list server? Like, large files should be sent using FTP instead
of
>>e-mail attachments.
>>
>>Are there some additional functions within IMail that can be tailored
to
>>allow the SMTP relay to be open and yet more flexibly addressing the
>>SPAM problem? Such as: allowing (TBD) number of messages a day for
any
>>FROM: users outside @mydomains.com, instead of knowing their
>>IP addresses. Or the ability to implement different levels of
restriction
>>upon different kinds of user (@mydomains.com (single vs. bulk) vs.
>>@otherdomain.com (single vs. bulk)). I guess this is leading to
>>re-thinking the Mail Relay Options (changing from only one option to
cover
>>all).
>>
>>Forgive the ramblings of an old man, but sometimes we think better
when we
>>see it in print.
>>
>>John A. Young
>>
>>
>>On Tue, 3 Aug 1999 23:09:03 -0700, Ricky Keele Keele wrote:
>>
>> >Most all of the IPS's are blocking all outbound mail that is not
coming
>> from thier network. This helps stop span. You will have to enter your
ISP's
>>SMTP server address as your outbound server.
>> >
>> >Ricky Keele MCSE
>> >Please visit http://www.ipswitch.com/support/mailing-lists.html
>> >to be removed from this list.
>> >
>>
>>
>>
>>Please visit http://www.ipswitch.com/support/mailing-lists.html
>>to be removed from this list.
>Please visit http://www.ipswitch.com/support/mailing-lists.html to
>be removed from this list.
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