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imapsync/FAQ.d/FAQ.Flags.txt
Nick Bebout 4a1d71d8fd 1.644
2015-08-03 20:44:40 -05:00

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#!/bin/cat
$Id: FAQ.Flags.txt,v 1.3 2015/04/03 21:05:11 gilles Exp gilles $
======================================================================
Imapsync and flags
======================================================================
Questions answered here are:
Q. How to debug flag issues?
Q. Is there a way to only sync messages with a specific flag set,
for example, the \Seen flag?
Q. How to convert flags?
Q. Does imapsync retain the \Answered and $Forwarded flags?
Q. How to fix this error: BAD Invalid system flag \FORWARDED
Q. How to convert flags with $ to \ character?
Q. imapsync fails with the following error:
flags from : [\Seen NonJunk]
Error trying to append string: 58 NO APPEND Invalid flag list
Q. Flags are not well synchronized. Is it a bug?
=======================================================================
Q. How to debug flag issues?
R. Use --debugflags
imapsync ... --debugflags
=======================================================================
Q. Is there a way to only sync messages with a specific flag set,
for example, the \Seen flag?
R. use --search
imapsync ... --search SEEN
or
imapsync ... --search UNSEEN
or ...
The complete list of search things are listed below
http://www.faqs.org/rfcs/rfc3501.html
6.4.4. SEARCH Command
...
ALL
All messages in the mailbox; the default initial key for
ANDing.
ANSWERED
Messages with the \Answered flag set.
BCC <string>
Messages that contain the specified string in the envelope
structure's BCC field.
BEFORE <date>
Messages whose internal date (disregarding time and timezone)
is earlier than the specified date.
BODY <string>
Messages that contain the specified string in the body of the
message.
CC <string>
Messages that contain the specified string in the envelope
structure's CC field.
DELETED
Messages with the \Deleted flag set.
DRAFT
Messages with the \Draft flag set.
FLAGGED
Messages with the \Flagged flag set.
FROM <string>
Messages that contain the specified string in the envelope
structure's FROM field.
HEADER <field-name> <string>
Messages that have a header with the specified field-name (as
defined in [RFC-2822]) and that contains the specified string
in the text of the header (what comes after the colon). If the
string to search is zero-length, this matches all messages that
have a header line with the specified field-name regardless of
the contents.
KEYWORD <flag>
Messages with the specified keyword flag set.
LARGER <n>
Messages with an [RFC-2822] size larger than the specified
number of octets.
NEW
Messages that have the \Recent flag set but not the \Seen flag.
This is functionally equivalent to "(RECENT UNSEEN)".
NOT <search-key>
Messages that do not match the specified search key.
OLD
Messages that do not have the \Recent flag set. This is
functionally equivalent to "NOT RECENT" (as opposed to "NOT
NEW").
ON <date>
Messages whose internal date (disregarding time and timezone)
is within the specified date.
OR <search-key1> <search-key2>
Messages that match either search key.
RECENT
Messages that have the \Recent flag set.
SEEN
Messages that have the \Seen flag set.
SENTBEFORE <date>
Messages whose [RFC-2822] Date: header (disregarding time and
timezone) is earlier than the specified date.
SENTON <date>
Messages whose [RFC-2822] Date: header (disregarding time and
timezone) is within the specified date.
SENTSINCE <date>
Messages whose [RFC-2822] Date: header (disregarding time and
timezone) is within or later than the specified date.
SINCE <date>
Messages whose internal date (disregarding time and timezone)
is within or later than the specified date.
SMALLER <n>
Messages with an [RFC-2822] size smaller than the specified
number of octets.
SUBJECT <string>
Messages that contain the specified string in the envelope
structure's SUBJECT field.
TEXT <string>
Messages that contain the specified string in the header or
body of the message.
TO <string>
Messages that contain the specified string in the envelope
structure's TO field.
UID <sequence set>
Messages with unique identifiers corresponding to the specified
unique identifier set. Sequence set ranges are permitted.
UNANSWERED
Messages that do not have the \Answered flag set.
UNDELETED
Messages that do not have the \Deleted flag set.
UNDRAFT
Messages that do not have the \Draft flag set.
UNFLAGGED
Messages that do not have the \Flagged flag set.
UNKEYWORD <flag>
Messages that do not have the specified keyword flag set.
UNSEEN
Messages that do not have the \Seen flag set.
=======================================================================
Q. How to convert flags?
R. use --regexflag
For example to convert flag IMPORTANT to flag CANWAIT
imapsync ... --regexflag "s/IMPORTANT/CANWAIT/g" --debugflags
option --debugflags is usefull to see in details what imapsync
does with flags.
=======================================================================
Q. Does imapsync retain the \Answered and $Forwarded flags?
R. It depends on the destination server.
a) If the destination server honours the "PERMAENTFLAGS \*"
directive (meaning it accepts any flag) or no PERMAENTFLAGS at all
then imapsync synchronizes all flags except the \Recent flag
(RFC 3501 says about \Recent flag "This flag can not be
altered by the client.").
b) If the destination server honours the "PERMAENTFLAGS without the
special "\*" then imapsync synchronizes only the flags listed
in PERMANENTFLAGS.
Some imap servers have problems with flags not beginning with
the backslash character \
(see next question to find a solution to this issue)
=======================================================================
Q. How to fix this error: BAD Invalid system flag \FORWARDED
R. Filter flag \FORWARDED with --regexflag like this:
On Windows:
imapsync ... --regexflag "s/\\FORWARDED//g"
On Unix:
imapsync ... --regexflag 's/\\FORWARDED//g'
or
imapsync ... --regexflag "s/\\\\FORWARDED//g"
=======================================================================
Q. How to convert flags with $ to \ character?
R. $ and \ are special characters we have to "escape" them.
For example to convert flag $label1 to \label1
imapsync ... --regexflag "s/\$label1/\\label1/g" --debugflags
======================================================================
Q. imapsync fails with the following error:
flags from : [\Seen NonJunk]
Error trying to append string: 58 NO APPEND Invalid flag list
R. For some servers, flags have to begin with a \ character.
The flag "NonJunk" may be a invalid flag for your server
so use for example:
imapsync ... --regexflag "s/NonJunk//g"
Remark (thanks to Arnt Gulbrandsen):
IMAP system flags have to begin with \ character.
Any other flag must begin with another character.
System flags are just flags defined by an RFC instead of by users.
Conclusion, some imap server coders don't read the RFCs (so do I).
Recent imapsync deals with this issue by filter with PERMANENTFLAGS
automatically.
=======================================================================
Q. Flags are not well synchronized. Is it a bug?
R. It happens with some servers on the first sync.
Also, it was a bug from revision 1.200 to revision 1.207
Two solutions:
* Run imapsync a second time. imapsync synchronizes flags on each run.
* Use option --syncflagsaftercopy. With this option imapsync will
also sync flags after each message transfer. Flags are already
synced during the transfer with the imap APPEND command but
option --syncflagsaftercopy does it again using the imap STORE
command.
=======================================================================