>So, I have no choice but to comply to some third parties rules or suffer
>the consequences of bounced emails and huge logs and more drain on the
>server since they are replying no each of the 20 times I try to send out
>an email.
I've noticed that more mail servers are starting to use the "ORBS-like"
lists of open relays. The time is coming where people are realizing that
as the numbers of open relays dwindle, the percentage of spam-to-legitimate
mail from them increases.
>So I have the following checked:
>
>Relay for local users only
That's the big problem. That means that you will let spammers send mail
through your server if they are willing to forge their return address to be
something on your domain. You'll get less spammers using your server that
way, but when they do, the cost of cleanup will be a lot higher (most
bounce messages and complaints will end up going to you or a customer of
yours).
You want "Relay for Addresses". You enter a list of the "safe" IP
addresses, and then anyone coming from an outside IP address can use SMTP AUTH.
>Refuse Null<>Senders
This is the other problem. If you aren't yet, you'll soon be listed in
www.rfc-ignorant.org 's spam database. This option will reject bounce
messages and delivery status notifications.
IMail REALLY needs to fix it so that people can't accidentally check this
non-RFC-compliant option.
-Scott
---
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