Problem with Dovecot and BlackBerry

[Aki Tuomi]

On 06.04.2017 07:50, lists at lazygranch.com wrote:
> On Tue, 04 Apr 2017 11:07:26 +0000
> Luca Bertoncello <lucabert at lucabert.de> wrote:
>
>> Hi all,
>>
>> i've got a strange behaviour with a BlackBerry Classic Phone (BBOS  
>> 10.3.2.2876) in combination with Dovecot 2.2.13 while trying to
>> fetch mails.
>>
>> Before burying myself into debugging sessions, i try to get an  
>> understanding if the following is a Client- or a Server-specific
>> error in the behaviour:
>>
>> CIGA8 UID FETCH 10009:10035 (UID FLAGS) (CHANGEDSINCE NOMODSEQ)
>> CIGA8 BAD Error in IMAP command UID FETCH: Invalid CHANGEDSINCE
>> modseq.
>>
>> Following the full conversation.
>> ----
>> * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
>> ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5
>> AUTH=CRAM-MD5] Dovecot on xxx ready.
>> CIGA1 CAPABILITY
>> * CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE
>> IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5
>> CIGA1 OK Pre-login capabilities listed, post-login capabilities have
>> more. CIGA2 ID ("os" "BlackBerry 10" "os-version" "10.3.2.2876"
>> "vendor" "rim" "device" "Classic" "name" "bbimap")
>> * ID ("name" "Dovecot")
>> CIGA2 OK ID completed.
>> CIGA3 LOGIN xxx xxx
>> * CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE
>> IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
>> THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT
>> CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE
>> QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS
>> SPECIAL-USE BINARY MOVE CIGA3 OK Logged in
>> CIGA4 CAPABILITY
>> * CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE
>> IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
>> THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT
>> CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE
>> QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS
>> SPECIAL-USE BINARY MOVE CIGA4 OK Capability completed.
>> CIGA5 LIST "" ""
>> * LIST (\Noselect) "." ""
>> CIGA5 OK List completed.
>> CIGA6 LIST "" "*"
>> * LIST (\HasNoChildren) "." folder_a
>> * LIST (\HasNoChildren) "." folder_b
>> * LIST (\HasNoChildren) "." folder_c
>> * LIST (\HasNoChildren) "." sent-mail
>> * LIST (\HasNoChildren) "." folder_d
>> * LIST (\HasNoChildren) "." folder_e
>> * LIST (\HasNoChildren \Trash) "." Trash
>> * LIST (\HasNoChildren \Drafts) "." Drafts
>> * LIST (\HasNoChildren) "." folder_f
>> * LIST (\HasNoChildren) "." folder_g
>> * LIST (\HasNoChildren) "." INBOX
>> CIGA6 OK List completed.
>> CIGA7 SELECT INBOX (CONDSTORE)
>> * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
>> * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)]  
>> Flags permitted.
>> * 7 EXISTS
>> * 0 RECENT
>> * OK [UIDVALIDITY 1391686038] UIDs valid
>> * OK [UIDNEXT 10036] Predicted next UID
>> * OK [HIGHESTMODSEQ 1608] Highest
>> CIGA7 OK [READ-WRITE] Select completed (0.000 secs).
>> CIGA8 UID FETCH 10009:10035 (UID FLAGS) (CHANGEDSINCE NOMODSEQ)
>> CIGA8 BAD Error in IMAP command UID FETCH: Invalid CHANGEDSINCE
>> modseq. CIGA9 LOGOUT
>> * BYE Logging out
>> CIGA9 OK Logout completed.
>> ----
>>
>> Thanks in advance!
>>
>> Luca Bertoncello
>> (lucabert at lucabert.de)
> Is that the dovecot.log file?
>
> Here is what  I get:
>
> # dovecot --version
> 2.2.28 (bed8434)
>
> bbos 10.3.3.2205
>
>
> Sanitized log file below. I'd appreciate the moderator removing my post
> if I let something slip.
>
> Apr 06 04:01:02 imap-login: Info: Login: user=<me at mydomain.com>, method=PLAIN, rip=myip, lip=myserver, mpid=77887, TLS, session=<bunchachars>
> Apr 06 04:01:02 imap(me at mydomain.com): Debug: Added userdb setting: plugin/=yes
> Apr 06 04:01:02 imap(me at mydomain.com): Debug: Effective uid=1003, gid=1003, home=/var/mail/vhosts/mydomain.com/me
> Apr 06 04:01:02 imap(me at mydomain.com): Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:~
> Apr 06 04:01:02 imap(me at mydomain.com): Debug: maildir++: root=/var/mail/vhosts/mydomain.com/me, index=, indexpvt=, control=, inbox=/var/mail/vhosts/mydomain.com/me, alt=
> Apr 06 04:01:04 auth: Debug: client in: AUTH    1       PLAIN   service=imap    secured session=differentchars        lip=myserver     rip=myip       lport=143
> rport=47037     local_name=www.mydomain.com   resp=lotsofchars= (previous base64 data may contain sensitive data)

It would seem like a bug in your Blackberry email client, it should not
do this.

CIGA8 UID FETCH 10009:10035 (UID FLAGS) (CHANGEDSINCE NOMODSEQ)

The CHANGEDSINCE expects some numeric value, not NOMODSEQ.

Aki