[Dovecot] Dovecot Virtual Users with Sendmail

Fri Jan 4 08:44:11 EET 2013

On Jan 3, 2013, at 12:49 PM, Andrzej A. Filip wrote:

> On 01/03/2013 06:37 AM, DormitionSkete at hotmail.com wrote:
>> 
>> On Jan 2, 2013, at 4:14 PM, Andrzej A. Filip wrote:
>> 
>>> On 01/02/2013 08:46 PM, DormitionSkete at hotmail.com wrote:
>>>> On Jan 2, 2013, at 11:12 AM, Andrzej A. Filip wrote:
>>>> 
>>>>> On 01/02/2013 06:53 PM, DormitionSkete at hotmail.com wrote:
>>>>>> [...]
>>>>>> This is the mail header from the mqueue:
>>>>>> 
>>>>>> [...]
>>>>>> MDeferred: dovecot mailer (/usr/local/libexec/dovecot/dovecot-lda) exited with EX_TEMPFAIL
>>>>>> [...]
>>>>> 
>>>>> Check dovecot's logs
>>>>> If it does not help the push delivery of messages ni sendmail's queue in
>>>>> verbose mode: "sendmail -Am -v -q"
>>>> 
>>>> Well, the logs showed this:
>>>> 
>>>> Sep 21 21:47:08 openindiana sendmail[1208]: [ID 702911 mail.warning] gethostbyaddr(10.211.55.6) failed: 2
>>>> Sep 21 21:47:08 openindiana sendmail[1208]: [ID 702911 mail.warning] gethostbyaddr(IPv6:fec0::fea9:21c:42ff:feed:5f38) failed: 2
>>> 
>>> I have asked for _dovecot's_ logs. Your problem may be caused e.g. by
>>> sendail executing dovecot-lda "as wrong user".
>>> 
>>>> So I put this in my /etc/hosts file:
>>>> 
>>>> 10.211.55.6 localhost
>>>> 
>>>> And I added DOVECOT to my /etc/hosts 127.0.0.1 line.  
>>> 
>>> *DO NOT* add DOVECOT (magic word in sendail config) to /etc/hosts.
>>> 
>>>> This cleared the queue, but now all of the mail for the virtual users bounces with this:
>>>> The original message was received at Wed, 2 Jan 2013 11:16:27 -0700 (MST)
>>>> from openindiana [IPv6:::1]
>>>> 
>>>>  ----- The following addresses had permanent fatal errors -----
>>>> <hacwebstore at localhost>
>>>>   (reason: 550 5.1.1 User unknown)
>>>> hacwebstore at DOVECOT
>>>>   (reason: 550 5.1.1 User unknown)
>>>>   (expanded from: <hacwebstore at localhost>)
>>>> 
>>>>  ----- Transcript of session follows -----
>>>> 550 5.1.1 hacwebstore at DOVECOT... User unknown
>>>> 550 5.1.1 <hacwebstore at localhost>... User unknown
>>>> 
>>>> 
>>>> 
>>>> Then I took the DOVECOT out of the 127.0.0.1 line, and it still bounces with the same error.
>>>> 
>>>> How would I invoke this:  "sendmail -Am -v -q"  ?  Change my startup script?
>>> 
>>> It is intended as one time debug help. It should show in more verbose
>>> way delivery attempts of messages staying in sendail's queue.
>>> 
>>> 
>>> Another test: As root try to deliver message to virtual dovecot mailbox:
>>> /usr/lib/dovecot-lda -d hacwebstore
>>> 
>> 
>> 
>> Please forgive me, Andrzej.  I did not realize you wanted me to actually send you the logs.  I thought you only meant for me to look to see if there was anything helpful in them.
>> 
>> They do not show much.  If I restart dovecot and sendmail, this is basically what I get.  If I try to send any mail, nothing shows up in dovecot's log.  All that shows up anywhere is my logging into squirrelmail.
>> 
>> 
>> network-dovecot-default.log
>> 
>> [ Jan  2 21:52:07 Stopping because service restarting. ]
>> [ Jan  2 21:52:07 Executing stop method ("/lib/svc/method/dovecot.sh stop"). ]
>> [ Jan  2 21:52:07 Method "stop" exited with status 0. ]
>> [ Jan  2 21:52:07 Executing start method ("/lib/svc/method/dovecot.sh start"). ]
>> [ Jan  2 21:52:07 Method "start" exited with status 0. ]
>> 
>> dovecot-info.log
>> 
>> Jan 02 21:54:48 master: Info: Dovecot v2.1.12 starting up
>> 
>> dovecot.log
>> 
>> Jan 02 21:54:48 master: Warning: Killed with signal 2 (by pid=2587 uid=0 code=kill)
>> 
>> syslog
>> 
>> Sep 21 21:47:08 openindiana sendmail[1208]: [ID 702911 mail.warning] gethostbyaddr(10.211.55.6) failed: 2
>> Sep 21 21:47:08 openindiana sendmail[1208]: [ID 702911 mail.warning] gethostbyaddr(IPv6:fec0::fea9:21c:42ff:feed:5f38) failed: 2
>> 
>> ---
>> 
>> systemuser at openindiana:~# /usr/local/libexec/dovecot/dovecot-lda -d hacwebstore
>> 
>> I had to modify the path to get it to work in Solaris.  When I ran it as above, it sent a blank email to hacwebstore.  
>> 
>> So, lda appears to be working, but sendmail doesn't?
>> 
>> ---
>> 
>> Here is the dovecot portion of my sendmail.cf file again, for your convenience.  Does it appear ok to you?
>> 
>> 
>> ######################*****##############
>> ###   DOVECOT Mailer specification                              ###
>> ##################*****##################
>> Mdovecot,   P=/usr/local/libexec/dovecot/dovecot-lda, F=DFMPhnu9,
>>                 S=EnvFromL/HdrFromL, R=EnvToL/HdrFromL,
>>                 T=DNS/RFC822/X-Unix,
>>                 A=/usr/local/libexec/dovecot/dovecot-lda -d $u
>> 
>> 
>> ---
>> 
>> I do have an odd behaviour I noticed in my syslog.  It has the wrong date!  Very odd.
>> 
>> Thank you again, Andrzej, for all of your help with this.  I appreciate it very much.
>> 
>> Do you think it is solvable?
> 
> 
> Quick fix:
> Add S flag to F= section (F=DFMSPhnu9) of dovecot mailer spec abvove.
> Without U= section it should make sendmail execute dovecot-lda as root.
> U= section may request execution as specific user and group.
> 
> Some hints at:
> 1 Dovecot's Wiki
> http://wiki.dovecot.org/LDA/Sendmail
> 2 "The Bat Book" (sendmail book)
> http://books.google.com/books?id=NQblqMiVqvQC&pg=PT806&lpg=PT806&dq=sendmail+F%3DS&source=bl&ots=ql4axryGUD&sig=9ovTnv7L3g-ZsygsgRqDLnkyDF0&hl=en&sa=X&ei=FN_lUKu9HMaKhQfIgIGABQ&redir_esc=y
> 
> 

Ah.  Thank you, Andrzej!  It seems to be working now!

Glory be to our holy God.

I really appreciate your help, so very, very much.

May God bless you!

Cordially,

+Peter, hieromonk