http://kenai.com/bugzilla/show_bug.cgi?id=5086
Bug #: 5086
Summary: If mail.imap.socketFactory.fallback is used connection
to some providers not possible
Classification: Unclassified
Product: javamail
Version: 1.4.5
Platform: All
OS/Version: All
Status: NEW
Severity: major
Priority: P5
Component: imap
AssignedTo: shannon_at_kenai.com
ReportedBy: tking_at_kenai.com
CC: issues_at_javamail.kenai.com
Created attachment 531
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http://kenai.com/bugzilla/attachment.cgi?id=531
Brief Java Programm to Reproduce the Case
Hi all,
I am using mail.imap.socketFactory.fallback=true and this stops my code from
connecting to some providers (like freenet.de and aol.com).
The reason is that some providers like the ones named above advertise STARTTLS
even though the connection to the server is already secured by SSL. Javamail
picks this advertisement for STARTTLS up and tries to initiate TLS over a SSL
connection. This is then rejected by these (previously named) IMAP servers. See
the log for mx.freenet.de while connecting over SSL:
DEBUG: getProvider() returning
javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems,
Inc]
...
DEBUG: enable STARTTLS
...
* OK IMAP ready.
A0 CAPABILITY
* CAPABILITY IMAP4rev1 AUTH=CRAM-MD5 QUOTA STARTTLS
A0 OK CAPABILITY completed
DEBUG IMAP: AUTH: CRAM-MD5
DEBUG: protocolConnect login, host=mx.freenet.de, user=bernd.prober_at_freenet.de,
password=<non-null>
A1 STARTTLS
A1 NO TLS already active
DEBUG IMAP: STARTTLS ProtocolException:
com.sun.mail.iap.CommandFailedException: A1 NO TLS already active
I attached a small java program that reproduces the case with Javamail 1.4.5.
I also attached a bugfix for this. The change is simple: It just checks if the
socket is not of instance SSLSocket before initiating the STARTTLS sequence.
As TLS over SSL does not make much sense I believe this change is valid and
sound. I tested this bugfix with all kinds of IMAP servers (like dovecot,
courier, cyrus, 1&1, etc) and different SSL/TLS settings. I could not find any
interference with this bugfix.
Could you please review my bug description and the solution I propose?
Best regards,
Thomas
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