All,
[ Apologies if this was fixed or otherwise addressed already. ]
I'm using dbmail 2.2.10, and it looks like the EXAMINE command is
marking messages as read when I FETCH them. This looks like a bug that
was fixed ages ago:
http://osdir.com/ml/mail.imap.dbmail.devel/2004-10/msg00124.html
However I have tested the behavior and it is still working this way.
If you run the attached Python script, you will see that the status of
the e-mail is changed, even though the IMAP library is using "EXAMINE"
to connect to the mailbox. To do this, run:
$ python ExamineFail.py imap-host imap-user
Flags for added message:
Flags for added message: \Seen
As you can see, the first time the message has no flags, and the second
time the message has the \Seen flag set. As I understand the RFC, this
should not be allowed.
It uses SSL. If you don't have this enabled then you can change the call
from IMAP4_SSL to IMAP4.
Note that you can use BODY.PEEK[] rather than RFC822 when getting the
e-mails and then the flags are not updated. The problem is not all
programs do this, but rather expect that read-only access is in fact
read-only.
--
Shane
import imaplib
import sys
import getpass
import random
import email.parser
import time
# log in using host/user/password specified on command line
if (len(sys.argv) < 3) or (len(sys.argv) > 4):
sys.stderr.write('Syntax: %s host user [password]\n' % sys.argv[0])
sys.exit(1)
host = sys.argv[1]
imap = imaplib.IMAP4_SSL(host)
user = sys.argv[2]
if len(sys.argv) == 4:
password = sys.argv[3]
else:
password = getpass.getpass("IMAP password for %s at %s:" % (user, host))
imap.login(user, password)
# create an e-mail message to put in the mailbox
message_text = """
From: [email protected]
To: [email protected]
Subject: ExamineFail.py message
Date: %s
This message is to show IMAP EXAMINE failing in dbmail.
""" % time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime())
parser = email.parser.Parser()
email_message = parser.parsestr(message_text.lstrip())
email_flags = ('\\Recent',)
email_time = imaplib.Time2Internaldate(time.time())
# create a new mailbox
created = False
while not created:
mailbox_name = 'ExamineFail%05d' % random.randint(0, 99999)
typ, replies = imap.create(mailbox_name)
if typ == 'OK':
created = True
# from this point on, execute in a try/except block so we can
# cleanup the mailbox on any errors
try:
# put a message in the mailbox
typ, replies = imap.append(mailbox_name,
email_flags, email_time, str(email_message))
if typ != 'OK': raise RuntimeError('Unable to append to mailbox')
# now select the mailbox for read-only access
# this uses the EXAMINE command of IMAP
typ, replies = imap.select(mailbox_name, True)
if typ != 'OK': raise RuntimeError('Unable to select mailbox')
# get our message
typ, msgnum_info = imap.search(None, 'ALL')
if typ != 'OK': raise RuntimeError('Unable to search')
msgnums = msgnum_info[0].split()
if len(msgnums) != 1:
raise RuntimeError('%d messages in mailbox, should be 1' % len(msgnums))
typ, data = imap.fetch(msgnums[0], '(RFC822 FLAGS)')
if typ != 'OK': raise RuntimeError('Unable to fetch message')
info = data[0]
flags = imaplib.ParseFlags(info[0])
msg = info[1]
sys.stdout.write('Flags for added message: ' + ', '.join(flags) + '\n')
# now open the mailbox again (still read-only), and check the flags
typ, replies = imap.select(mailbox_name, True)
if typ != 'OK': raise RuntimeError('Unable to select mailbox')
typ, msgnum_info = imap.search(None, 'ALL')
if typ != 'OK': raise RuntimeError('Unable to search')
msgnums = msgnum_info[0].split()
if len(msgnums) != 1:
raise RuntimeError('%d messages in mailbox, should be 1' % len(msgnums))
typ, data = imap.fetch(msgnums[0], '(RFC822 FLAGS)')
if typ != 'OK': raise RuntimeError('Unable to fetch message')
info = data[0]
flags = imaplib.ParseFlags(info[0])
msg = info[1]
sys.stdout.write('Flags for added message: ' + ', '.join(flags) + '\n')
finally:
typ, replies = imap.delete(mailbox_name)
if typ != 'OK':
sys.stderr.write('Error deleting mailbox "%s"\n' % mailbox_name)
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