Cyrus IMAP, sendmail and LDAP

[John Arthur]

The way you have it setup now Sendmail accepts all mail before trying to
deliver it via cyrus (just like most secondary and some primary mx servers
do). So if I send 1000 emails to non existant users your sendmail will
accept them all (regardless of weather they exist or not) before trying to
deliver them to cyrus. Because I'm a spammer I've used fake return addresses
so you now have 1000 bounces sitting in your mail queue (which Sendmail
keeps trying to resend every hour)until they expire putting a strain on your
resources.

Every time I have setup LDAP routing for a domain (primarily on the mx
servers but also on the cyrus system) it has resulted in a 80% to 90%
reduction in mail traffic and server load.



-----Original Message-----
From: owner-info-cyrus at lists.andrew.cmu.edu
[mailto:owner-info-cyrus at lists.andrew.cmu.edu]On Behalf Of AJ
Sent: Thursday, 8 July 2004 8:21 AM
To: info-cyrus at lists.andrew.cmu.edu
Subject: Re: Cyrus IMAP, sendmail and LDAP


Thanks.  I have reviewed the sendmail page numerous times, but my
question is what is the difference between the way I have things set up
now, i.e just using cyrus as a local mailer, as opposed to ldap_routing.
I am not sure why one would go one way or the other, just trying to clarify.

Thanks.
AJ

Andrzej Filip wrote:
> AJ wrote:
>
>>  My setup is cyrus, sendmail and openldap for all users data.
>> The way I have things set up now is sendmail use cyrus local mailer,
>> and is not compile w/ LDAP support, so if a mailbox does not exist in
>> cyrus,   it gets bounced.  Sendmail does not do user/mailbox lookups
>> via LDAP.
>> This seems to work ok, but on the net I have been reading most people
>> set up sendmail to look at ldap for users, rather than cyrus.
>> Can some people share their setups on how they implement these three
>> together?
>
>
> * LDAP ROUTING (sendmail)
> http://www.sendmail.org/m4/ldap_routing.html
> *  Autocreate INBOX patch for Cyrus
> http://email.uoa.gr/projects/cyrus/autocreate/index.html
>
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