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Bug 1548016 - TB does not download emails from IMAP
Summary: TB does not download emails from IMAP
Status: CLOSED DUPLICATE of bug 1549096
Alias: None
Product: Fedora
Classification: Fedora
Component: thunderbird
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Gecko Maintainer
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2018-02-22 14:27 UTC by Vít Ondruch
Modified: 2018-02-26 15:45 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2018-02-26 15:34:41 UTC
Type: Bug

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1534532 0 unspecified CLOSED Strong crypto settings 2022-05-16 11:32:56 UTC

Internal Links: 1534532

Description Vít Ondruch 2018-02-22 14:27:39 UTC
Description of problem:
TB refuse to download emails from IMAP server. Not really sure what happened. This is the log I get (with newly created profile, just to be sure):

$ NSPR_LOG_MODULES=imap:5,timestamp thunderbird
[calBackendLoader] Using Thunderbird's builtin libical backend
2018-02-22 14:19:40.563905 UTC - 751814400[7f3621d13460]: ImapThreadMainLoop entering [this=21daa000]
2018-02-22 14:19:40.563959 UTC - 1613412160[7f365ed63140]: clearing IMAP_CONNECTION_IS_OPEN
2018-02-22 14:19:40.566009 UTC - 751814400[7f3621d13460]: entering
2018-02-22 14:19:40.566109 UTC - 751814400[7f3621d13460]:  = currentUrl
2018-02-22 14:19:41.072738 UTC - 751814400[7f3621d13460]: ReadNextLine [stream=21c16180 nb=0 needmore=1]
2018-02-22 14:19:41.072793 UTC - 751814400[7f3621d13460]: clearing IMAP_CONNECTION_IS_OPEN - rv = 805a2f8d
2018-02-22 14:19:41.073045 UTC - 751814400[7f3621d13460]: close socket connection
2018-02-22 14:19:41.073079 UTC - 751814400[7f3621d13460]: (null)
2018-02-22 14:19:41.079292 UTC - 751814400[7f3621d13460]: aborting queued urls
2018-02-22 14:19:41.089575 UTC - 751814400[7f3621d13460]: ImapThreadMainLoop leaving [this=21daa000]

Version-Release number of selected component (if applicable):
$ rpm -q thunderbird

How reproducible:

Steps to Reproduce:

Actual results:
TB does not download emails nor list of folders, anything.

Expected results:
TB download mails just fine.

Additional info:
Yesterday, it used to work just fine. I updated the computer and still, I would say it worked just fine, but today, it does not work. Not sure if it might be server side issue or how to debug it.

Comment 1 Vít Ondruch 2018-02-23 09:54:59 UTC
Of, finally I discovered that in JS console, there is reported following error:

An error occurred during a connection to

SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message.


I was suggested by Jan Hořák to try [1], so I disabled all the "dhe" options and it seems that my TB can connect to the server once again. Not sure if the security is better or worse now though.


Comment 2 Vít Ondruch 2018-02-26 15:34:41 UTC
This seems to be caused by crypto-policies change:

I opened different ticket there.

*** This bug has been marked as a duplicate of bug 1549096 ***

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