Hardening of POP3 and SMTP communication:
SMTP: Decrement failure counter when no possible message send
occurred. This way, K-9 will only stop attempting to send messages
for which a possible successful send occurred, but K-9 could not
detect. Any message that is known to have completely failed to send
will be reattempted indefinitely.
POP3: Some reworking of Exception handling. Also, if it is not
possible to get a "message number" for the UID of the message that is
being deleted, conclude that the message has already been deleted on
the server. Mark this as a permanent error, so that it gets removed
from the pending actions queue.
MessagingController: Look for the permanentFailure flag on the
MessagingException, and if a pending action raised a permanent
failure, remove the pending action from the queue so that it will not
be re-attempted nor block later requests.
Significant hardening of the email sending process.
A given message in the Outbox is only attempted to be sent 5 times.
Once the threshold is reached, the message is flagged. asses through
the Outbox skip flagged messages. The message can be tried again by
manually unflagging. When any messages are flagged during a pass
through the Outbox, K-9 raises a notification with a fast flashing red
LED, alerting the user to the failure to send. A note is also placed
in the K9mail-errors.
The read timeout on SMTP connections has been changed to 300000ms (5
minutes)
The send attempt counter is kept in memory, not stored with the
message, so a phone or application restart will clear the counters,
but not the flagged state. As the intent of this revision is to avoid
runaway message sending, this is deemed to be acceptable for now.
The moving of messages from the Outbox to the Sent folder has been
changed to an atomic move.
Extra error checking has been added to the SMTP communication code.
The flashing LED may be excessive.
features are added to K9mail:
1) Show unread message count on each folder
2) Sum unread count of all shown folders in an account to the account display
3) Periodically check selected folders for new mail, not just Inbox
4) Don't refresh folder when opened (unless folder is empty)
5) Show date and time of last sync for each folder
6) Fix timer for automatic periodic sync (use wakelock to assure completion)
7) Optimize local folder queries (speeds up account and folder lists)
8) Show Loading... message in status bar indicating which folder is being synced
9) Eliminate redundant sync of new messages (performance enhancement)
10) Improve notification text for multiple accounts
11) Do not automatically sync folders more often than the account-specific period
12) Use user-configured date and time formats
13) Select which folders are shown, using configurable Classes
14) Select which folders are synced, using configurable Classes
15) Added context (long press) menu to folders, to provide for Refresh
and Folder Settings
16) Status light flashes purple when there are unread messages
17) Folder list more quickly eliminates display of deleted and out-of-Class folders.
18) Delete works
19) Mark all messages as read (in the folder context menu)
20) Notifications only for new unread messages
21) One minute synchronization frequency
22) Deleting an unread message decrements unread counter
23) Notifications work for POP3 accounts
24) Message deletes work for POP3 accounts
25) Explicit errors show in folder list
26) Stack traces saved to folder K9mail-errors
27) Clear pending actions (danger, for emergencies only!)
28) Delete policy in Account settings
29) DNS cache in InetAddress disabled
30) Trapped some crash-causing error conditions
31) Eliminate duplicate copies to Sent folder
32) Prevent crashes due to message listener concurrency
33) Empty Trash
34) Nuclear "Mark all messages as read" (marks all messages as read in
server-side folder, irrespective of which messages have been downloaded)
35) Forward (alternate) to allow forwarding email through other programs
36) Accept text/plain Intents to allow other programs to send email through K9mail
37) Displays Outbox sending status
38) Manual retry of outbox sending when "Refresh"ing Outbox
39) Folder error status is persisted
40) Ability to log to arbitrary file
Fixes K9 issues 11, 23, 24, 65, 69, 71, 79, 81, 82, 83, 87, 101, 104,
107, 120, 148, 154
Daniel Applebaum