Re: [exim-dev] Relay during SMTP session

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著者: Philip Hazel
日付:  
To: Magnus Holmgren
CC: exim-dev
題目: Re: [exim-dev] Relay during SMTP session
On Fri, 24 Aug 2007, Magnus Holmgren wrote:

> Recipient callout verification takes care of nonexisting users (if no better
> method is possible) as well as other errors that can be detected at RCPT
> time. Later errors will result in an NDR, but to completely eliminate them
> you will need to complete all deliveries, whether local or remote, before
> returning an OK status. That can take a long time and would require a rather
> fundamental redesign.


Indeed. Remember that "a long time" might be days... The "better method"
referred to might be a shared database, LDAP or otherwise.

-- 
Philip Hazel            University of Cambridge Computing Service
Get the Exim 4 book:    http://www.uit.co.uk/exim-book