Stuart Henderson wrote:

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> On 2007/05/22 15:50, Renaud Allard wrote:

>> Stuart Henderson wrote:

>

> You wouldn't need spamd on the address of a send-only instance..

> (if mail's only submitted on 587/465 or from known address ranges, it

> could just RST port 25 to the rest of the world).

Good point :)
>

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>> Also, MS exchange servers don't like 4xx errors at DATA time and may

>> forbid the mail from being delivered until the exchange instance is

>> restarted. I know this is also a bug in Exchange, but many people use it.

>

> Yeuch... I didn't know about that. Found it here (needs user-agent:

> googlebot) - http://www.windowsitpro.com/Article/ArticleID/95332/95332.html

> 

I have only seen this when the 4xx error is sent at DATA time, not when

sent at RCPT TO.
> How about: --i-dont-want-to-receive-mail-from-people-using-exchange-2003

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> and --i-dont-want-to-receive-mail-from-people-using-callout-verification

Those are the default flags indeed.
>

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> I think a better solution would be for *more* people to use greylisting

> implementations which do this, so that more MSexchange users will either

> bother Microsoft to fix their bug, or script 'net stop smtpsvc;net start

> smtpsvc' to run a few times a day so they can send mail to others too.

Most of the time with people running exchange, they don't care and don't

have a clue about what happens and argue that _your_ server is broken

because they don't have problems elsewhere.
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