IMAP Server Compliance
- Checkpoint: checkpoint parameter works. When issuing a CHECK command in all sessions, their state looks identical.
- \Recent: Exactly one session sees a new message as \Recent - no more and no less.
- Atomic flags: Flags and keywords can be added/removed in multiple sessions without one session dropping changes made by other (own_flags test)
- Expunge fetch: If message is expunged in one session, can another session that still sees the message fetch its contents?
- Yes: Yes, everything can be fetched
- Cached: Only cached data can be fetched. Message header or body can't be.
- No: Nothing but flags can be fetched.
- Expunge store: If message is expunged in one session, can another session update its flags?
- Yes: Yes, and a 3rd session also sees the change
- Session: Yes, but a 3rd session won't see the change
Delayed: Yes, but a 3rd session won't see any changes until EXPUNGEs are reported
- Ignored: STORE command replies OK, but no change is made
- No: STORE command replies NO
Failures: Number of failures using command/reply tests (failures / number of tests). These numbers may not be exact all the time, because the tests are still changing.
Fully compliant servers:
Server |
Checkpoint |
\Recent |
Atomic flags |
Expunge fetch |
Expunge store |
Failures |
Dovecot 1.1.0+ |
Yes |
Yes |
Yes |
Cached |
Yes |
0/34 |
Panda IMAP 2008, mix format |
Yes |
Yes |
Yes |
Yes |
Session |
0/34 |
Non-compliant servers:
Server |
Checkpoint |
\Recent |
Atomic flags |
Expunge fetch |
Expunge store |
Failures |
Dovecot 1.0.15 |
Yes |
Unreliable |
Bugs |
Cached |
Yes |
1/34 |
UW-IMAP 2007b, mix format |
Yes |
Yes |
Yes |
Yes |
Session |
2/34 |
Isode M-Box 14.3a0 |
No |
Unreliable |
Yes |
Cached |
Ignored |
6/34 |
CommuniGate Pro 5.2.1 |
Yes |
Yes |
Yes |
Cached (some) |
No |
8/34 |
Zimbra 5.0.5 |
Yes |
Yes |
Yes |
Cached |
No |
8/34 |
Cyrus 2.3.12p2 |
No |
Unreliable |
Bugs |
Cached |
Delayed |
9/34 |
Sun Java Messenging Server 6.3-0.15 |
No |
Unreliable |
Bugs |
Yes |
Delayed |
9/34 |
GMail 2008-06-24 |
No |
Not implemented |
Bugs |
Yes |
No (\Deleted flag expunges) |
15/34 |
Courier 4.3.1 |
Yes |
Unreliable |
Yes |
No |
No |
18/34 |
Citadel 7.36 |
No |
Unreliable |
Yes |
Yes |
Session (flag changes are never seen by other sessions) |
19/34 |
dbmail 2.3.3 |
Crashes too early to test. APPEND missing EXISTS replies. |
Yes |
Delayed (always) |
? |
||
Major problems with multiple connections (makes further testing difficult and MAY CAUSE ACCIDENTAL MAIL LOSS!):
Server |
Checkpoint |
\Recent |
Atomic flags |
Expunge fetch |
Expunge store |
Failures |
Archiveopteryx 3.0.0 |
? |
? |
? |
No |
No |
EXPUNGEs are sent wrong |
IBM Domino 8.0 |
No |
Unreliable |
? |
? |
No |
16/34 - Too many EXPUNGEs are sent, EXISTS is dropped before sending EXPUNGEs, FETCHing with valid messagesets produce errors |
Kerio Mail Server 6.5.1 |
? |
? |
? |
? |
? |
18/34 - EXPUNGEs are sent wrong |