[sendmail] lmtp, cyrusv2d, shared folders and case

Andrzej Adam Filip anfi at onet.eu
Thu Apr 2 04:53:27 EDT 2009

nodens2099 <nodens2099 at gmail.com> wrote:

> Andrzej Adam Filip a écrit :
>> nodens2099 <nodens2099 at gmail.com> wrote:
>>> I tried setting
>>> "lmtp_downcase_rcpt: 0"
>>> in imapd.conf, adding the u flag to the cyrusv2d mailer, but to no avail.
>>> the +part is always converted to lower case.
>> Post your cyrusv2d definition from sendmail.cf.
>>   echo '=M' | sendmail -bt | grep cyrusv2d
>> Does it contain F=u flag?
> Yes, but only once I added the F=u flag to the m4 file
> (MODIFY_MAILER_FLAGS(`cyrusv2d', `+u') in the sendmail.mc didn't work).
> mailer 4 (cyrusv2d): P=[IPC] S=EnvFromSMTP/HdrFromL
> R=EnvToSMTP/EnvToSMTP M=0 U=-1:-1 F=1DFMXlmnqsuz L=0 E=\r\n
> T=DNS/RFC822/SMTP r=100 A=FILE /var/run/cyrus/socket/lmtp
> Thanks !
>> By default sendmail's mailers convert user part of recipient address to
>> lowercase. F=u flag stops it. 
>> *BUT* it would apply to "normal recipients" *too*.
> That whas my understanding as well.
> but it's ok, since lmtp_downcase_rcpt: yes takes care of the username part.
>>> initially I tried using the mrs_cyrus_mailertable approach but it was even
>>> worse, as checking +folder/subfolder at domaine.tld with smmap returns unknown
>>> user, even when the folder exists and has the "p" acl.     
>> Does smmap return "unknown user" *even for lowercase folders*?
> Nope, you're right. the real problem is on the mrs check, then. 

It can use only what smmap provides.
Are you ready to ask for changed in Cyrus' smmap to make it capable to
check Public folders availability?

mrs_cyrus_mailertable may be changed to check validity of mailbox folder
its own list of valid folders.

> If I create a lowerrcase folder along the mixed cased one, the mail is
> received in the correct folder (that is, the mixed case).
>>> Any clue ?
>>> I'd really like to avoid converting all existing folders to lower case of
>>> possible, it would be painful.
>> It merely a matter of choosing a simple way you like anyway :-)
>> BTW
>> Why have not you tried RTCyrus3 recipe?
>> [ It would require small "patching" too to meet your requirements ]
> Actually, I was adding a new backend in an existing murder environment,
> migrating existing users and public folders from MS Exchange server.
> Since rtcyrusv2 "just works" in the existing environment, I didn't even
> check if there was an update. I saw about RTCyrus3 only when searching a
> solution to my public folder problem.
> if it can resolve the mrs_cyrus_mailertable problem, and if it's not too
> difficult to upgrade rtcyrus2 with it, I'm willing to give it a try.

It can be fixed but you should decide which path do you want do go:
a) Cyrus smmap can tell if public folders is accessible
b) sendmail uses its own list of valid publicly accessible Cyrus public folders

[pl>en: Andrew] Andrzej Adam Filip : anfi at onet.eu
She's the kind of girl who climbed the ladder of success wrong by wrong.
  -- Mae West

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