sendmail-8.12.6+cyrus-imapd-2.0.17: check presence of the cyrus mailbox during establishing SMTP connection

[Andrzej Filip]

Igor Brezac wrote:
> On Fri, 7 Nov 2003, Andrzej Filip wrote:
> 
> 
>>Rob Siemborski wrote:
>>
>>>On Thu, 6 Nov 2003, Andrzej Filip wrote:
>>>
>>>
>>>>>- What would the map name be?  cyrus?  Would it ever change?  Can people
>>>>>envision different types of maps that this daemon would have to support?
>>>>
>>>>"cyrus" seems to be good default name.
>>>>Let us start with "mailbox presence" checking.
>>>
>>>I agree.
>>>
>>>
>>>>Next version may also:
>>>>* check if mailbox will accpet message of given size based on "SIZE="
>>>>parameter of "MAIL FROM:"
>>>>* take into account who successfully authenticated SMTP session
>>>>[it can make some folders accessible]
>>>>* apply some sieve reject rules based on envelope sender and sending host
>>>
>>>This last one might be very hard, especially if rules are based half off
>>>an envelope bit and half off a header bit.  I wouldn't want to think of
>>>trying to run a sieve interpreter with limited information.
>>
>>Would not it be posiible to interpet only heading sieve rules which reject
>>message based on info available at "RCPT TO:" point ?
>>First "non reject" or "need information not available yet" sieve rule would
>>stop "envelope based" sieve rules interpretation.
>>[ Reject what you know for sure you will reject later - ASAP reject ]
>>
>>It would be nice to allow sieve reject messages before message body is
>>received. IMHO it is worth to investigate achievable gain/cost.
> 
> This would be nice, but as much as sendmail 'abuses' these maps I wonder
> if busier sites would be able to use such maps.

Current sendmail.cf can ask up to 7 virtusertable queries but who said we have 
to use maps already existing  in sendmail.cf ?
[e.g. virtusertable or access]

With careful desing of new map queries in sendmail.cf we can reduce number of 
queries to single one executed only when "RCPT TO:" is received (in 
Scheck_rcpt rule set, no queries during queue runs)

-- 
Andrzej [pl>en: Andrew] Adam Filip http://www.polbox.com/a/anfi/
anfi at priv.onet.pl anfi at xl.wp.pl [former: anfi at Box43.pl]