Mail addresses with quotes + Postfix

[Stephan Bosch]

Op 7-3-2018 om 15:40 schreef Stephan Bosch:
>
>
> Op 7-3-2018 om 13:46 schreef Philipp Berger:
>> I wrapped the LDA command in a script. I can see that Postfix passes
>> "@@mydomain.tld" as the -d argument, without quotes.
>> I then adapted the script to specifically replace this address with
>> "@"@mydomain.tld, but this results in the following error message by
>> Dovecot:
>>
>>      auth: Info: userdb(?): Username character disallowed by
>> auth_username_chars: 0x22 (username: "@"@mydomain.tld)
>>
>> So what would be the appropriate quoting/setting for this address?
>
> Adding " to auth_username_chars would help.
>
> But why are you trying to accept such incredibly horrible 
> email-addresses/usernames?
>
Also, -d is used to provide the username. For -d, you could leave out 
the double quotes and provide the full e-mail address--including the 
required quotes--to the -r argument.

It all depends on what your userdb expects.

Regards,

Stephan.

>> Am 06-Mar-18 um 15:08 schrieb Stephan Bosch:
>>>
>>> Op 6-3-2018 om 14:34 schreef Philipp Berger:
>>>> I upgraded to Dovecot 2.3.0.1 as advised, but it still seems 
>>>> broken. In
>>>> the Postfix log I now see:
>>>>
>>>> Mar  6 13:49:03 myhost amavis[7165]: (07165-10) K00VtLRHdrYw FWD from
>>>> <admin at mydomain.tld> -> <"@"@mydomain.tld>, BODY=7BIT 250 2.0.0 from
>>>> MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as B8CA22DA1B37
>>>> Mar  6 13:49:03 myhost amavis[7165]: (07165-10) Passed CLEAN
>>>> {RelayedInbound}, [someIp]:11439 [someIp] <admin at mydomain.tld> ->
>>>> <"@"@mydomain.tld>, Queue-ID: D27792DA167C, Message-ID:
>>>> <22b95756-e95e-86cf-219c-3b603f7587c8 at mydomain.tld>, mail_id:
>>>> K00VtLRHdrYw, Hits: -3, size: 7472, queued_as: B8CA22DA1B37, 1863 ms
>>>> Mar  6 13:49:03 myhost postfix/smtp[2329]: D27792DA167C:
>>>> to=<@@mydomain.tld>, relay=127.0.0.1[127.0.0.1]:10024, delay=2,
>>>> delays=0.15/0.01/0/1.9, dsn=2.0.0, status=sent (250 2.0.0 from
>>>> MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as B8CA22DA1B37)
>>>> Mar  6 13:49:03 myhost postfix/pipe[2282]: B8CA22DA1B37:
>>>> to=<@@mydomain.tld>, relay=dovecot, delay=0.2, delays=0.11/0/0/0.09,
>>>> dsn=5.1.1, status=bounced (user unknown)
>>>> Mar  6 13:49:03 myhost postfix/cleanup[2280]: EA37E2DA1F80:
>>>> message-id=<20180306124903.EA37E2DA1F80 at mydomain.tld>
>>>> Mar  6 13:49:04 myhost postfix/bounce[2334]: B8CA22DA1B37: sender
>>>> non-delivery notification: EA37E2DA1F80
>>>> Mar  6 13:49:04 myhost postfix/qmgr[21911]: EA37E2DA1F80: from=<>,
>>>> size=9830, nrcpt=1 (queue active)
>>>> Mar  6 13:49:04 myhost postfix/qmgr[21911]: B8CA22DA1B37: removed
>>>> Mar  6 13:49:04 myhost postfix/pipe[2282]: EA37E2DA1F80:
>>>> to=<admin at mydomain.tld>, relay=dovecot, delay=0.07,
>>>> delays=0.05/0/0/0.02, dsn=5.3.0, status=bounced (command line usage
>>>> error. Command output: lda: Fatal: Invalid -f parameter: Missing
>>>> domain )
>>>>
>>>> I can see in my MySQL Log that Dovecot queried at the same time 
>>>> with %n
>>>> = "" (empty) and %d = "@mydomain.tld". So now the "@" is dropped
>>>> entirely.
>>>>
>>>> What does the "Fatal: Invalid -f parameter: Missing domain" tell 
>>>> us? Do
>>>> I need to change the way Postfix calls Dovecot? Add more quotes? :D
>>> Can you check what Postfix is feeding to Dovecot exactly (i.e.,
>>> whether it is properly escaped)? Maybe wrap dovecot-lda in some shell
>>> script and see what is passed.
>>>
>>> Regards,
>>>
>>> Stephan.
>>>
>>>> Kind regards,
>>>> Philipp
>>>>
>>>> Am 04-Mar-18 um 21:12 schrieb Stephan Bosch:
>>>>> Op 3/1/2018 om 2:07 PM schreef Philipp Berger:
>>>>>> Dear all,
>>>>>>
>>>>>> I have a working setup with Postfix + Dovecot, storing users in a
>>>>>> MySQL
>>>>>> table.
>>>>>>
>>>>>> I ran into problems setting up and using a mail address like
>>>>>> a"@"b at mydomain.tld, which by RFC should be valid, but leads to
>>>>>> problems
>>>>>> in Dovecot. From my debugging, I can see that on the lookup, Dovecot
>>>>>> replaces %n with "a" (quotes added by me) and %d with 
>>>>>> "b at mydomain.tld"
>>>>>> (quotes added by me). So the original quotes are gone, and the
>>>>>> domain/user split is incorrect.
>>>>>>
>>>>>> I am not sure of Postfix passes the address without quotes to
>>>>>> Dovecot or
>>>>>> whether Dovecot can not handle quotes correctly, but I was hoping 
>>>>>> that
>>>>>> someone with more insight into Dovecot could help me out here.
>>>>>>
>>>>>> System Info: Debian 9, Postifx 3.1.6-0+deb9u1, Dovecot 
>>>>>> 2.2.27-3+deb9u1
>>>>>> Postfix master.cf for Dovecot:
>>>>>> dovecot unix  -       n       n       -       - pipe
>>>>>>     flags=DRhu user=virtual:virtual
>>>>>> argv=/usr/lib/dovecot/dovecot-lda -f
>>>>>> ${sender} -d ${user}@${nexthop}
>>>>>>
>>>>>> I am grateful for any hints :)
>>>>>>
>>>>>> Thank you in advance, kind regards,
>>>>> Yeah, Dovecot v2.2 is doing some funky stuff with SMTP address 
>>>>> parsing.
>>>>> Dovecot v2.3 should do a better job. I am still not sure if this 
>>>>> can be
>>>>> fixed well for Dovecot v2.2.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Stephan.
>>>>
>>
>